TY - JOUR AU - Lü, Haishen AU - O'Regan, Donal AU - Agarwal, Ravi P. TI - On the existence of multiple periodic solutions for the vector $p$-Laplacian via critical point theory JO - Applications of Mathematics PY - 2005 SP - 555 EP - 568 VL - 50 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1007/s10492-005-0037-8/ DO - 10.1007/s10492-005-0037-8 LA - en ID - 10_1007_s10492_005_0037_8 ER -