@article{BSMF_1985__113__387_0,
     author = {Nkashama, M.N.},
     title = {Solutions p\'eriodiques des syst\`emes non conservatifs p\'eriodiquement perturb\'es},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {387--402},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {113},
     year = {1985},
     doi = {10.24033/bsmf.2040},
     mrnumber = {87i:34046},
     zbl = {0607.34041},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2040/}
}