@article{CRMATH_2016__354_1_75_0,
     author = {Liu, Hongliang and Chen, Haibo and Wang, Gangwei},
     title = {Multiplicity for a 4-sublinear {Schr\"odinger{\textendash}Poisson} system with sign-changing potential via {Morse} theory},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {75--80},
     publisher = {Elsevier},
     volume = {354},
     number = {1},
     year = {2016},
     doi = {10.1016/j.crma.2015.10.018},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2015.10.018/}
}