... studied in the literature, see Coff-man [1], Henderson and Wang [7], Lan and Webb [8] and the references therein. Also theexistence of positive solutions of second order ODEs with nonlinear boundary ... (3. 16)Therefore (3. 1)holds. AcknowledgmentsThe authors are very grateful to the anonymous referee for his/her valuable suggestions.Supported by the NSFC (no. 102 7109 5), GG- 110- 10 736 -10 03, ... boundary conditionshas been studied by several authors, see Dunninger and Wang [2], Wang [11] and Wangand Jiang [12] for some references along this line. However for the uniqueness problem of second...