[1] 葛渭高. 非线性常微分方程边值问题 [M]. 北京:科学出版社 2007. [2] 马如云. 非线性常微分方程非局部问题 [M]. 北京:科学出版社 2004. [3] Zhang Zhitao. Existence of non-trivial solution for superlinear system of integral equations and its applications [J]. Acta Mathematicae Applicatae Sinica 1999, 2(2). [4] Ma RY.. Multiple nonnegative solutions of second-order systems of boundary value problems [J]. Nonlinear Analysis: An International Multidisciplinary Journal 2000, 6(6). [5] Bingmei Liu, Lishan Liu, Yonghong Wu. Positive solutions for singular systems of three-point boundary value problems [J]. Computers & Mathematics with Applications: An International Journal 2007, 9(9). [6] Hu L, Wang LL. Multiple positive solutions of boundary value problems for systems of nonlinear second-order differential equations [J]. Journal of Mathematical Analysis and Applications 2007, 2(2). [7] Yang, J., Wei, Z.. On existence of positive solutions of Sturm-Liouville boundary value problems for a nonlinear singular differential system [J]. Applied mathematics and computation 2011, 13(13). [8] F. Merdivenci Atici, G. Sh Guseinov. On the existence of positive solutions for nonlinear differential equations with periodic boundary conditions [J]. Journal of Computational and Applied Mathematics 2001, 2(2). [9] GUO Dajun, LAKSHMIKANTHAM V. Nonlinear problems in abstract cones [M]. New York:Academic Press, Inc 1988. [10] KRASNOSELSKII M. Positive solutions of operator equations [M]. Groningen:Noordhoff 1964. |