@article{JNSA_2016_9_6_a0,
     author = {Liu, Jian and Zhao, Zengqin},
     title = {Variational approach  to second--order damped {Hamiltonian} systems  with impulsive effects },
     journal = {Journal of nonlinear sciences and its applications},
     pages = {3459-3472},
     publisher = {mathdoc},
     volume = {9},
     number = {6},
     year = {2016},
     doi = {10.22436/jnsa.009.06.01},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.22436/jnsa.009.06.01/}
}