Logistic equation with the p -Laplacian and constant yield harvesting. Oruganti, Shobha; Shi, Junping; Shivaji, Ratnasingham — 2004 Abstract and Applied Analysis
Population models with nonlinear boundary conditions. Goddard, Jerome; Lee, Eun Kyoung; Shivaji, Ratnasingham — 2010 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]
Subsolutions: a journey from positone to infinite semipositone problems. Lee, Eun Kyoung; Shivaji, Ratnasingham; Ye, Jinglong — 2009 Electronic Journal of Differential Equations (EJDE) [electronic only]