Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1966_170_5_a4, author = {Yu. S. Kolesov}, title = {A criterion for the existence of periodic solutions of parabolic equations}, journal = {Doklady Akademii Nauk}, pages = {1013--1015}, publisher = {mathdoc}, volume = {170}, number = {5}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_5_a4/} }
Yu. S. Kolesov. A criterion for the existence of periodic solutions of parabolic equations. Doklady Akademii Nauk, Tome 170 (1966) no. 5, pp. 1013-1015. http://geodesic.mathdoc.fr/item/DAN_1966_170_5_a4/