@article{1183496402, author = {Fite, W. B.}, title = {Periodic solutions of linear differential equations}, journal = {Bull. Amer. Math. Soc.}, volume = {38}, number = {12}, year = {1932}, pages = { 865-871}, language = {en}, url = {http://dml.mathdoc.fr/item/1183496402} }
Fite, W. B. Periodic solutions of linear differential equations. Bull. Amer. Math. Soc., Tome 38 (1932) no. 12, pp. 865-871. http://gdmltest.u-ga.fr/item/1183496402/