Condiciones suficientes para la existencia de sluciones débiles del problema de frontera Alfonso Castro — 1975 Revista colombiana de matematicas
Corrección a: condiciones suficientes para la esistencia de soluciiones debiles del propblema de frontera: ... Alfonso Castro — 1977 Revista colombiana de matematicas
Energy Analysis Of A Nonliner Singular Differential Equations And Applications. Alfonso Castro; Alexandra Kurepa — 1987 Revista colombiana de matematicas
Multiple radial solutions for a semilinear Dirichlet problem in a ball Alfonso Castro; Jorge Cossio — 1993 Revista colombiana de matematicas
Applications of a max-min principle Alfonso Castro; A. C. Lazer — 1976 Revista colombiana de matematicas
Necessary And Sufficient Conditions For Existence Of Solutions To Equations With Noninvertible Linear Part. Alfonso Castro; Peter W. Bates — 1981 Revista colombiana de matematicas
A perspective on the contributions of Alan C. Lazer to critical point theory. Castro, Alfonso — 2000 Electronic Journal of Differential Equations (EJDE) [electronic only]
Hammerstein integral equations with indefinite kernel. Castro, Alfonso — 1978 International Journal of Mathematics and Mathematical Sciences
The Lazer-McKenna conjecture for radial solutions in the ℝ N ball. Castro, Alfonso; Gadam, Sudhasree — 1993 Electronic Journal of Differential Equations (EJDE) [electronic only]
A variational characterization of the Fucík spectrum and applications. Castro, Alfonso; Chang, Chen — 2010 Revista Colombiana de Matemáticas
Existence of many positive nonradial solutions for a superlinear Dirichlet problem on thin annuli. Castro, Alfonso; Finan, Marcel B. — 2000 Electronic Journal of Differential Equations (EJDE) [electronic only]
Nonlinear eigenvalue problems with semipositone structure. Castro, Alfonso; Maya, C.; Shivaji, R. — 2000 Electronic Journal of Differential Equations (EJDE) [electronic only]
A minimax principle, index of the critical point, and existence of sign-changing solutions to elliptic boundary value problems. Castro, Alfonso; Cossio, Jorge; Neuberger, John M. — 1998 Electronic Journal of Differential Equations (EJDE) [electronic only]
Infinitely many radial solutions for a sub-super critical Dirichlet boundary value problem in a ball. Castro, Alfonso; Kwon, John; Tan, Chee Meng — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]
Positive solutions for classes of multiparameter elliptic semipositone problems. Caldwell, Scott; Castro, Alfonso; Shivaji, Ratnasingham; Unsurangsie, Sumalee — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]
A sign-changing solution for a superlinear Dirichlet problem. II. Castro, Alfonso; Drábek, Pavel; Neuberger, John M. — 2003 Electronic Journal of Differential Equations (EJDE) [electronic only]