Open Science Research Excellence
Li Xiguang,  Positive Solutions for Boundary Value Problems of Fourth-Order Nonlinear Singular Differential Equations in Banach Space.   journal   = {International Journal of Mathematical, Computational, Physical, Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology. April 2013, vol. 76(4). 762 - 766[viewed 23 February 2019]. Available from: http://waset.org/publications/17068.