@article{AIHPC_1997__14_1_103_0, author = {Chang, K. C. and Liu, J. Q. and Liu, M. J.}, title = {Nontrivial periodic solutions for strong resonance hamiltonian systems}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, volume = {14}, year = {1997}, pages = {103-117}, mrnumber = {1437190}, zbl = {0881.34061}, language = {en}, url = {http://dml.mathdoc.fr/item/AIHPC_1997__14_1_103_0} }
Chang, K. C.; Liu, J. Q.; Liu, M. J. Nontrivial periodic solutions for strong resonance hamiltonian systems. Annales de l'I.H.P. Analyse non linéaire, Tome 14 (1997) pp. 103-117. http://gdmltest.u-ga.fr/item/AIHPC_1997__14_1_103_0/
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