@article{BSMF_1950__78__185_0,
     author = {Campbell, Robert},
     title = {Contribution \`a l'\'etude des solutions de l'\'equation de {Mathieu} associ\'ee},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {185--218},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {78},
     year = {1950},
     doi = {10.24033/bsmf.1415},
     mrnumber = {13,34a},
     zbl = {0040.32402},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1415/}
}