TY - JOUR AU - Su, Xinwei AU - Zhang, Shuqin TI - Solutions to boundary-value problems for nonlinear differential equations of fractional order JO - Electronic journal of differential equations PY - 2009 VL - 2009 UR - http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a102/ LA - en ID - EJDE_2009__2009__a102 ER -