@article{COCV_2010__16_1_77_0,
     author = {Zhao, Fukun and Zhao, Leiga and Ding, Yanheng},
     title = {Infinitely many solutions for asymptotically linear periodic hamiltonian elliptic systems},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {77--91},
     publisher = {EDP-Sciences},
     volume = {16},
     number = {1},
     year = {2010},
     doi = {10.1051/cocv:2008064},
     mrnumber = {2598089},
     zbl = {1189.35091},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv:2008064/}
}