PRINTED PAPERS A. Abbondandolo and J.E. Molina . Index ...

33 (1979), 259-296.
M. Carozza and C. Sbordone . ThedistancetoL∞ in some function spaces and applications . Diff.
and Integral Equ.4(1997), 599-607-474.
R.M. Carraro . Variational problem with obstructions . Ph.D. Thesis SISSA (1988), 1-120.
M.J. Carro and J. Soria . boundedness of some integral operators . Can. J. Math.45(1993), 1155-1166.
M.J. Carro and J. Soria . Weighted Lorentz spaces and the Hardy operator . J. Functional Analysis112(1993),
480-494.
M.J. Carro and J. Soria , The Hardy-Littlewood maximal function and weighted Lorentz spaces. J.
London Math. Soc.. 55 146-158(1997).
C. Cascante, J.M. Orgtega and I.E. Verbitsky , Trace inequalities of Sobolev type in the upper
triagle case. Proc. London Math. Soc.. 80 391-414(2000).
A. Castro . Reduction methods via Minimax, . Primer Simposio Colombiano de Analisis Funcional,
Medellin, Colombia.(1981).
A. Castro . Non-negative solutions for non-positone problems . College on Variational problems
in analysis, ICTP, Trieste, Italy.(1988).
A. Castro . A perpective on the contributions of A.C. Lazer to critical point theory . Nonlinear
Diff. Equ. Electron. J.Conf. 05(2000), 13-19.
A. Castro and J. Cossio . Multiple solutions for a nonlinear Dirichlet problem . SIAM.J.Math.
Anal.6(1994), 1554-1561.
A. Castro, J. Cossio and J.M. Neuberger . A minmax principle, index of the critical point, and
existence of sign-changing solutions to elliptic boundary value problems . Nonlinear Diff. Equ.
Electron. J.1998(1998), 1-18.
A. Castro and M.B. Finan. Existence of many sign-changing nonradial solutions for semilinear
elliptic problems on thin annuli . Topological Methods in Nolinear Analysis, 13(1999), 273-279 .
A. Castro and S. Gadam . The Lazer-Mckenna conjecture for radial solutions in RN ball . Electronic
J. Diff.Equ.7(1993), 1-6.
A. Castro and A.C. Lazer . Critical point theory and the number of solutions of a nonlinear Dirichlet
problem . Ann.Mat.Pura Appl.70(1979), 113-137.
A. Castro and R. Shivaji . Non-negative solutions for a class of non-positone problems . Proc.Royal
Soc. Edinburgh.
A. Castro . and R. Shivaji .Non-negative solutions for for a class of radially symmetric non-positone
problems . College on Variational problems in analysis, ICTP, Trieste, Italy.(1988).
A. Castro . and R. Shivaji .Nonlinear eigenvalue problems with semipositone structure . Electronic
J. Diff.Equ.Conf. 05(2000), 33-49.
A. Cellina . On the existence problem in the calulus of variations . Preprint(),.
A. Cellina and F.Flores .Radially symmetric aolutions of a class of problems of the calculus of
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