@article{1050266979, author = {Eidelman, Y. S. and Tikhonov, I. V.}, title = {On periodic solutions of abstract differential equations}, journal = {Abstr. Appl. Anal.}, volume = {6}, number = {1}, year = {2001}, pages = { 489-499}, language = {en}, url = {http://dml.mathdoc.fr/item/1050266979} }
Eidelman, Y. S.; Tikhonov, I. V. On periodic solutions of abstract differential equations. Abstr. Appl. Anal., Tome 6 (2001) no. 1, pp. 489-499. http://gdmltest.u-ga.fr/item/1050266979/