Existence of positive solutions for semipositone higher-order BVPS on time scales. Lin, Yuguo; Pei, Minghe — 2010 Advances in Difference Equations [electronic only]
Positive solutions for two-point semipositone right focal eigenvalue problem. Lin, Yuguo; Pei, Minghe — 2007 Boundary Value Problems [electronic only]
Positive solutions of two-point right focal eigenvalue problems on time scales. Lin, Yuguo; Pei, Minghe — 2007 Advances in Difference Equations [electronic only]