1. On the existence of positive solutions of ordinary differential equations;Erbe;Proc. Amer. Math. Soc.,1994
2. A necessary and sufficient condition for the existence of positive solutions to singular sublinear boundary value problems;Zhao;Acta Math. Sinica,1998
3. Positive solutions of singular sublinear second order boundary value problems;Wei;J. Systems Sci. Math. Sci.,1998
4. Positive solutions of singular boundary value problems;Mao;Acta Math. Sinica,2001
5. Positive solutions of singular Enden–Fowler boundary value problems;Zhang;J. Math. Anal. Appl.,1994