Existence of solutions for a singular system of nonlinear fractional differential equations.

Wenquan Feng Shurong Sun Zhenlai Han Yige Zhao Existence of solutions for a singular system of nonlinear fractional differential equations. 1370-1378 2011 62 Computers & Mathematics with Applications 3 http://dx.doi.org/10.1016/j.camwa.2011.03.076 db/journals/cma/cma62.html#FengSHZ11