Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1976_12_5_a12, author = {L. N. Lyapin}, title = {Inclusions of {Hammerstein} type}, journal = {Differencialʹnye uravneni\^a}, pages = {908--915}, publisher = {mathdoc}, volume = {12}, number = {5}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_5_a12/} }
L. N. Lyapin. Inclusions of Hammerstein type. Differencialʹnye uravneniâ, Tome 12 (1976) no. 5, pp. 908-915. http://geodesic.mathdoc.fr/item/DE_1976_12_5_a12/