@article{05632502, title = {Singular positone and semipositone boundary value problems of nonlinear fractional differential equations.}, journal = {Mathematical Problems in Engineering}, volume = {2009}, year = {2009}, doi = {10.1155/2009/535209}, zbl = {1185.34008}, language = {en}, url = {http://dml.mathdoc.fr/item/05632502} }
Yuan, Chengjun; Jiang, Daqing; Xu, Xiaojie. Singular positone and semipositone boundary value problems of nonlinear fractional differential equations.. Mathematical Problems in Engineering, Tome 2009 (2009) . doi : 10.1155/2009/535209. http://gdmltest.u-ga.fr/item/05632502/