TY - JOUR AU - Zhang, Shuqin TI - Existence of solutions for two-point boundary-value problems with singular differential equations of variable order JO - Electronic Journal of Differential Equations PY - 2013 VL - 2013 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a135/ LA - en ID - EJDE_2013__2013__a135 ER -