@article{Castro1998, Author = {Castro, A. and Shivaji, R.}, Fjournal = {Nonlinear Analysis: Theory, Methods \& Applications}, Journal = {Nonlinear Anal.}, Number = {1}, Pages = {91--98}, Publisher = {Pergamon}, Title = {Positive solutions for a concave semipositone {D}irichlet problem}, Volume = {31}, Year = {1998}}