@article{bwmeta1.element.desklight-1bb41aba-b452-4395-a29d-cb1a711cc5b5,
author = {W. R. Utz},
title = {Periodic solutions of $x" + f(x)x^{\prime m} + g(x) = 0$
},
journal = {Annales Polonici Mathematici},
volume = {24},
year = {1971},
pages = {327-330},
zbl = {0216.11601},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-1bb41aba-b452-4395-a29d-cb1a711cc5b5}
}
W. R. Utz. Periodic solutions of $x" + f(x)x^{\prime m} + g(x) = 0$
. Annales Polonici Mathematici, Tome 24 (1971) pp. 327-330. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-1bb41aba-b452-4395-a29d-cb1a711cc5b5/