Zhang, X., & Liu, L. (2010). A necessary and sufficient condition of positive solutions for nonlinear singular differential systems with four-point boundary conditions. Elsevier Inc.
Chicago Style (17th ed.) CitationZhang, Xinguang, and L. Liu. A Necessary and Sufficient Condition of Positive Solutions for Nonlinear Singular Differential Systems with Four-point Boundary Conditions. Elsevier Inc, 2010.
MLA (9th ed.) CitationZhang, Xinguang, and L. Liu. A Necessary and Sufficient Condition of Positive Solutions for Nonlinear Singular Differential Systems with Four-point Boundary Conditions. Elsevier Inc, 2010.
Warning: These citations may not always be 100% accurate.