@article{BSMF_1949__77__1_0,
     author = {Campbell, Robert},
     title = {Sur une expression remarquable des solutions de p\'eriode $2k\pi $ de l{\textquoteright}\'equation de {Mathieu} associ\'ee},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {1--9},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {77},
     year = {1949},
     doi = {10.24033/bsmf.1402},
     mrnumber = {11,435d},
     zbl = {0036.06203},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.1402/}
}