@article{BMMS_2012_35_1_a2,
     author = {Liang Zhang and Yi Chen},
     title = {Existence of {Periodic} {Solutions} of $p(t)${-Laplacian} {Systems}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2012},
     volume = {35},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2012_35_1_a2/}
}