@article{JNSA_2018_11_3_a4,
     author = {Zhang, Qiongfen },
     title = {Existence of solutions for a class of second-order impulsive {Hamiltonian} system with indefinite linear part },
     journal = {Journal of nonlinear sciences and its applications},
     pages = {368-374},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {2018},
     doi = {10.22436/jnsa.011.03.05},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.22436/jnsa.011.03.05/}
}