@article{1183504146, author = {Ingram, W. H.}, title = {Forced oscillations of continuous dynamical systems}, journal = {Bull. Amer. Math. Soc.}, volume = {48}, number = {12}, year = {1942}, pages = { 153-162}, language = {en}, url = {http://dml.mathdoc.fr/item/1183504146} }
Ingram, W. H. Forced oscillations of continuous dynamical systems. Bull. Amer. Math. Soc., Tome 48 (1942) no. 12, pp. 153-162. http://gdmltest.u-ga.fr/item/1183504146/