@article{CRMATH_2004__338_8_657_0,
     author = {Servat, Emmanuelle},
     title = {A formal computation of the splitting for the {Klein{\textendash}Gordon} operator},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {657--660},
     publisher = {Elsevier},
     volume = {338},
     number = {8},
     year = {2004},
     doi = {10.1016/j.crma.2004.02.005},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.02.005/}
}