TY - JOUR AU - Zhang, Liang AU - Tang, X. H. TI - Periodic solutions for some nonautonomous $p(t)$-Laplacian Hamiltonian systems JO - Applications of Mathematics PY - 2013 SP - 39 EP - 61 VL - 58 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1007/s10492-013-0002-x/ DO - 10.1007/s10492-013-0002-x LA - en ID - 10_1007_s10492_013_0002_x ER -