Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1970_194_4_a6, author = {I. M. Koval'chik}, title = {Linear equations with functional derivatives}, journal = {Doklady Akademii Nauk}, pages = {763--766}, publisher = {mathdoc}, volume = {194}, number = {4}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_194_4_a6/} }
I. M. Koval'chik. Linear equations with functional derivatives. Doklady Akademii Nauk, Tome 194 (1970) no. 4, pp. 763-766. http://geodesic.mathdoc.fr/item/DAN_1970_194_4_a6/