1. An introduction to the fractional calculus and fractional differential equations;Miller,1993
2. Fractional differential equations: An introduction to fractional derivatives, fractional differential equations, to methods of their solution and some of their applications;Podlubny,1999
3. Theory and applications of fractional differential equations;Kilbas,2006
4. Theory of fractional functional differential equations;Lakshmikantham;Nonlinear Anal TMA,2008
5. The existence of multiple positive solutions for boundary value problems of nonlinear fractional differential equations;Zhao;Commun Nonlinear Sci Numer Simul,2011