[1] 万阿英, 蒋达清. 椭圆方程组径向非负解的存在性 [J]. 纯粹数学与应用数学 2001.doi:10.3969/j.issn.1008-5513.2001.01.019 [2] 蒋达清. MULTIPLE POSITIVE SOLUTIONS TO SINGULAR BOUNDARY VALUE PROBLEMS FOR SUPERLINEAR SECOND ORDER ODES [J]. 数学物理学报(英文版) 2002. [3] 郑连存, 张欣欣, 赫冀成. 传输过程奇异非线性边值问题 [M]. 北京:科学出版社 2003. [4] AGARWAL R P, REGAN D O, PATRICIA J Y W. Positive solutions of differential, difference and integral equations [M]. Netherlands:Kluwer Academic 1999. [5] GRANAS A, GUENTHER R B, LEE J W. Some general existence principles in the Caratheodory theory of nonlinear differential systems [J]. Journal de Mathematiques Pures et Appliquees 1991, 70. [6] REGAN D O. Theory of singular boundary value problems [M]. Singapore:World Scientific 1994. |