TY - JOUR AU - Feng, Hanying AU - Bai, Donglong AU - Feng, Meiqiang TI - Multiple symmetric positive solutions to four-point boundary-value problems of differential systems with $p$-Laplacian JO - Electronic Journal of Differential Equations PY - 2012 VL - 2012 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a46/ LA - en ID - EJDE_2012__2012__a46 ER -