1)       "The Coerciveness Problem for Forms over Vector Functions". Communications on Pure and Applied Mathematics, XVI (1963), pp. 63-94.

2)       "A Simplified Proof of the Divergence Theorem". American Mathematical Monthly, 71 (1964), pp. 619-622.

3)       "Fixed Point Theorems for Weakly Continuous Mappings". MRC report n. 638 (1966), 12 pp.

4)       "J-Monotone Non-linear Operators in Banach Spaces".(com F.E.Browder). Koninkl. Nederl. Akad. Wet., 28 (1966), pp. 412-420.

5)       "Fixed Point Theorems for Nonlinear Operators and Galerkin Approximations". Journal of Differential Equations, 3 (1967), pp. 271-281.

6)       "On the Radial Projection in Normed Spaces". (com L.A.Karlovitz). Bull. of the Amer. Math.Soc., 73 (1967), pp. 364-368.

7)       "Some Remarks on Fixed Point Theorems for Nonlinear Operators in Banach Spaces". Anais Acad. Bras. Ciências, 39 (1967), pp. 345-349.

8)       "On the Projection onto Convex Sets and the Extension of Contractions".(com L.A.Karlovitz). University of Maryland Tech. Note BN 524 (l967) e Proc. Conf on Projections and Related Topics at Clemson University.

9)       "On the Approximate Solution of Linear Functional Equations in Banach Spaces". (com L.A.Karlovitz). Journal. Math. Anal. Appl. 24 (1968), pp. 654-664.

10)     "On the Extension of Contractions in Normed Spaces". (com L.A.Karlovitz). Proc. Symposia in Pure Mathematics (AMS), Vol. 18, part 1 (1970), pp. 95-104.

11)     "Borsuk Type Theorems for Nonlinear Noncompact Mappings in Banach Space".(com C.P.Gupta). Proc. Conf. Funct. Anal. and its Applic., Indian Institute of Technology, Kanpur (1971), pp. 48-55.

12)     "Maximal Monotone Operators and Nonlinear Integral Equations of Hammerstein type". (com F.E.Browder e C.P.Gupta). Bull. Amer. Math. Soc., 76 (1970),700-705.

13)     "An Existence Theorem for Pseudo-Monotone Operators in Banach Spaces". Journal Math. Anal. Applic., 34 (1971), pp. 151-156.

14)     "The Extension of Contractions and the Intersection of Balls". (com L.A.Karlovitz). Journal Funct. Anal. 11(1972), pp. 168-178.

15)     "Nonlinear Integral Equations of Hammerstein Type Involving Linear Unbounded Operators". (com C.P.Gupta). Journal Math. Anal. Applic. 34 (1972), pp.37-48.

16)     "Nonlinear Integral Equations of Hammerstein Type with Indefinite Linear Kernel in Hilbert Space."(com C.P.Gupta). Indag. Math. 34 (1972), pp.335-344.

17)     "On a Boundary Value Problem Arising in Elastic Membrane Theory". Anais Acad. Bras. Ciências, 44 (1972), pp. 181-183.     

18)     "On the Variational Method for the Existence of Solutions of Nonlinear Equations of Hammerstein Type." (com C.P.Gupta). Proc. Amer. Math. Soc. 40 (1973), 470-476.

19)     "Extensions of Contractions and Mappings of Accretive Type". Atas da "Reunião de Análise", São Paulo, SBM (l973), pp. 109-160.

20)     "A Remark on the Fixed Point Theorem for Nonexpansive Mappings". Trabalho de Matemática no. 31, UnB (March 1973).

21)     "On the Range of Nonlinear Operators with Linear Asymptotes which are not Invertible Comm. Math. Univ. Carol. 15 (1974), pp. 415-428.

22)     "Some Remarks on the Dirichlet Problem for Semilinear Elliptic Equations". Anais Acad. Bras. Ciências, 46 (1974), pp.187-193.

23)     "On Coercive Elliptic Problems". Proceedings of the 2nd Brazilian Analysis Seminar, October 1975.

24)     "The Dirichlet Problem for Nonlinear Elliptic Equations. A Hilbert Space Approach". Partial Diff. Eq. and Related Topics, Springer Verlag Lecture Notes in Mathematics, vol. 446 (1975), pp. 144-165.

25)     "Semilinear Elliptic Problems with Nonlinearities near the First Eigenvalue". "Dynamical Systems", Proceedings of a University of Florida International Symposium. Edit. A.R.Bednarek and L.Cesari. Academic Press (1977), pp. 59-70.

26)     "Perturbation Non Linéaire d'un Problème Elliptique Linéaire près de sa Première Valeur Propre." (com J.-P. Gossez). C.R. Acad. Sci. Paris 284 (1977), pp.163-166.

27)     "Nonlinear Perturbations of a linear elliptic problem near its first eigenvalue" (com J.-P. Gossez). Journal Diff.Eq. 30 (1978), pp. 1-19.

28)     "Semilinear Elliptic Equations at Resonance: Higher Eigenvalues and Unbounded Nonlinearities". Recent Advances in Differential Equations. Ed. Roberto Conti, Academic Press (1981), pp. 89-99.

29)     "Perturbations of Second Order Linear Elliptic Problems by Nonlinearities without the Landesman-Lazer Condition."(com W.M. Ni) Nonlinear Analysis Th. Meth. Appl. 3 (1979), pp. 629-634.

30)     "Estimations a Priori pour les Solutions Positives de Problèmes Elliptiques Superlinéaires". (com P.-L. Lions e R.Nussbaum). C.R. Acad. Sci. Paris 290 (1980), pp. 217-220.

31)     "Double Resonance in Semilinear Elliptic Problems". (com H. Berestycki). Comm. Part. Diff. Eq. 6 (1981), pp. 91-120.

32)     "Positive Solutions of Semilinear Elliptic Problems". (com P.-L. Lions e R. Nussbaum). J. Math. Pures et Appliquées, 61 (1982), pp. 41-63.

33)     "On the Superlinear Ambrosetti- Prodi Problem". Nonlinear Analysis, Th. Meth. and Appl., 8 (1984), pp. 655-665.

34)     "A Variational Approach to Superlinear Elliptic Problems". (com S. Solimini). Comm. Part. Diff. Eq. 9 (1984), pp. 699-717.

35)     "On the Uniqueness of Positive Solutions of the Dirichlet Problem for -Du = l sin u." Nonlinear Partial Differential Equations, College de France Seminar, vol. 7, Pittman (1984), pp. 80-83.

36)     "On Pairs of Positive Solutions for a class of Semilinear Elliptic Problems. (com P.-L. Lions). Indiana Univ. Math. J. 34 (1985), pp. 591-606.

37)     "Radial Solutions of a Dirichlet Problem in a Ball". (com D.G. Costa). Journal of Diff. Eq. 60 (1985), pp. 80-89.

38)     "A Maximum Principle for an Elliptic System and Applications to Semilinear Problems". (com E. Mitidieri). SIAM J. Math.Anal. 17 (1986), pp.836-849.

39) "Positive Solutions for some Classes of Semilinear Elliptic Problems". "Nonlinear Functional Analysis and its Applications". Proc. of Symp. Pure Math. (AMS), vol. 45, part 1 (1986), pp. 371-380.

40)     "Conditions de Non-resonance pour Certains Problèmes Elliptiques Semi-linéaires". (com J.-P. Gossez). C.R. Acad. Sci Paris 302 (1986), pp. 543-545.

41)     "On the Uniqueness of Solution for a Class of Semilinear Elliptic Problems".(com D.G.Costa e J.V.A. Gonçalves). J. Math. Anal. Appl. 123 (1987), pp.170-180.

42)     "On the Existence of Multiple Ordered Solutions of Nonlinear Eigenvalue Problems". Nonlinear Analysis, Th. Meth. Appl. 11 (1987), pp. 481-492.

43)     "On Superlinear Elliptic Problems with Nonlinearities Interacting only with Higher  Eigenvalues". Rocky Mountain J. Math. 18 (1988), pp. 287-303.

44)     "Nonresonance Below the First Eigenvalue for a Semilinear Elliptic Problem". (com J.-P. Gossez). Math. Ann. 281 (1988), pp. 589-610.

45)     "Un problème elliptique semi-linéaire sans condition de croissance" (com J.-P. Gossez). C.R.Acad.Sci.Paris, t.308, Serie I (1989) pp. 277-280.

46)     "Maximum principles for cooperative systems" (com E.Mitidieri) C.R. Acad. Sci.Paris, t. 310, Serie I (1990) pp.49-52.

47)     "Semilinear elliptic equations with the primitive of the nonlinearity interacting with the first eigenvalue" (com I. Massabò), J. Math. Anal. Appl. vol. 156 (1991) pp. 381-394.

48)     "The exact number of solutions for a class of ordinary differential equations through Morse index computation" (com D.G. Costa e P.N.Srikanth),  J.Diff.Eq. vol 96 (1992) pp 185-199

49)     "On a superlinear Sturm-Liouville equation and a related bouncing problem"(com B. Ruf),   J. Reine Angew. Math. 421(1991) pp 1-22.

50)     "Semilinear elliptic equations with the primitive of the nonlinearity away from the spectrum" (com O.H.Miyagaki),  JNA-TMA  vol.17 (1991) pp 1201-1219.

51) “Strict Monotonicity of Eigenvalues and Unique Continuation” (com J.-P. Gossez), Comm. PDE 17(1&2) (1992) pp 339-346.

52) “Positive solutions of semilinear elliptic systems” (com Ph. Clément e E. Mitidieri),  Comm. PDE 17(1992) pp 923-940.

53) “A priori estimates for positive solutions of semilinear elliptic systems via Hardy-Sobolev inequalities” (com Ph. Clément e E.Mitidieri),Nonlinear Part Diff Eq., Pitman Res Notes in Math 343 (1996) p73-91.

54) “Small solutions of the forced pendulum equation and global bifurcation” (com A.C.Lazer), em preparação.

55) “On the periodic Fucik spectrum and a Superlinear Sturm-Liouville equation” (com B.Ruf), Proc. Royal Soc. Edinburg, 123A(1993) pp 95-107.

56) “Bifurcation from infinity and multiple solutions for an elliptic systems” (com R. Chiappinelli),  Diff. Int.Eq. vol.6 (1993), pp 757-771.

57) “Bifurcation from the Fucik spectrum”, (com I.Massabò), em preparação.

58) "Sur la première courbe du spectre de Fucik d'un opérateur elliptique".,(com J.-P. Gossez) C.R.Acad.Sci. Paris t.316 Série I (1993) pp. 1295-1298.

59) “On the first nontrivial curve of the Fucik spectrum of an elliptic operator” (com J.-P.Gossez), Diff. Int. Eq. vol.7 (1994), pp 1285-1302.

60) “Elliptic equations in R2 with nonlinearities in the critical growth range”, (com O.H. Miyagaki  e B. Ruf)  Calc. Var. vol.3 (1995) pp 139-153.

61) “Superquadratic elliptic systems” (com P. Felmer),Transactions of the Amer. Math. Soc.. vol343 (1994) pp 99-116.

62) “Maximum Principles for Linear Elliptic Systems”, (com E.Mitidieri),  Rendiconti dell'Istituto di Matematica dell'Univ. Trieste, vol.XXII-Fasc.I e II (1990) pp36-66.

63)  "Monotonicity and symmetry of solutions of elliptic systems in general domains",  Nonlinear Diff. Eq. and Appl. vol 1 (1994) pp119-123

64)  "A Liouville-type theorem for  elliptic systems"(com P. Felmer),  Annali della Scuola Normale Superiore di Pisa, vol.XXI(1994), pp387-397.

65) " Existence and non-existence of radial solutions for elliptic equations with critical growth in R2 ", (com B. Ruf),  Communications on Pure and Applied Mathematics, vol XLVIII, 639-655 (1995)

66) "On nonquadratic Hamiltonian Elliptic Systems", (com C.A. Magalhães) Advances in Differential Equations. Vol.1(1996) p881-898.

67) " Quasilinear Elliptic Equations with critical exponents", (com Ph. Clément e E. Mitidieri). Top Meth Nonl Anal. Vol.7 nº1(1996) p133-170.

68) "Decay, Symmetry and existence of positive solutions of semilinear elliptic systems",(com Yang Jianfu). Nonlinear Analysis, TMA, Vol 33 (1998) p211-234.                                                    

69) "On linear perturbations of superquadratic elliptic systems" (com M. Ramos),Reaction-Diffusion Systems, Lectures Notes in Pure and Applied Mathematics Series #194 (1998), p.121-130.

70)  "Some remarks on a system of quasilinear elliptic equations" (com Lucio Boccardo), a aparecer.

71)  “The beginning of the Fucik spectrum for the p-Laplacian” (com M. Cuesta e J.-P. Gossez), Journal of Differential Equations, vol 159 (1999),  p.212-238.

72)  “Sur le spectre de Fucik du p-Laplacien”, (com M. Cuesta e J.-P. Gossez),  C.R.Acad. Sci. Paris t.326(1998), 681-684.

73)   “Infinitely many solutions of nonlinear elliptic systems”, (com Thomas Bartsch), Progress in Nonlinear Differential Equations and Their Applications, Vol. 35 (The Herbert Amann Anniversary Volume)(1999), p.51-68.

74)  “Critical Superlinear Ambrosetti-Prodi problem” (com Yang Jianfu), Topological Methods in Nonlinear Analysis, Vol. 14, No.1, (1999), p.59-80.

75)    “On a class of quasilinear elliptic problems involving critical exponents,” (com J.V.Gonçalves e O.H. Miyagaki), Communications in Contemporary Mathematics., Vol. 2, No.1 (2000), p47-59.

76)    “A nodal domain property for the p-Laplacian”, C.R. Acad. Sci. Paris Ser. I Math. 330 (2000), p. 669-673.

77)    “A priori bounds for positive solutions of a non-variational elliptic system” 

       (com Yang Jianfu)          Comm. PDE. 26 (11&12), (2001) 2305-2322.

78)  “ On an inequality by Trudinger and Moser and related Nonlinear Elliptic Equations”                    (com  J.M. do O’ e B. Ruf),  Comm. Pure Appl Math. 55 (2002) 135-152

79)  “Solutions of a nonlinear Schrodinger  equation”, ( com Yanheng Ding), aceito no                        Discrete crete and Continuous  Dynamical Systems.

80)  “Nonvariational Elliptic Systems”, ( com  Claudianor O. Alves), Discrete and                           Continuous  Dynamical Systems, vol.8 (2002), 289-300.

81)    “On a Semilinear Elliptic Problem Without (PS) Condition.” (com Yang Jianfu),                Journal of Differential  Equations, 187 (2003), 412-428.

82)    “Nonvariational  Elliptic Systems via Galerkin Methods”,  (com C.C. Alves),                    Function Spaces, Differential   Operators and Nonlinear Analysis (The Hans Triebel               Anniverssary Volume),   Birkhauser (2003),p 47-57

83)    “Local Superlinearity and Sublinearity for Indefinite Semilinear Elliptic Problems (com J.-P. Gossez e P. Ubilla), J. Funct. Anal. 199 (2003), 452-467.