@article{CRMATH_2008__346_3-4_149_0,
     author = {Laurentiu Benoaga},
     title = {Long time existence problems for semilinear {Klein{\textendash}Gordon} equations},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {149--154},
     publisher = {Elsevier},
     volume = {346},
     number = {3-4},
     year = {2008},
     doi = {10.1016/j.crma.2007.11.012},
     language = {en},
}