Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1980_254_1_a3, author = {P. B. Gusyatnikov and E. S. Polovinkin}, title = {On two types of operators for biparametric equations}, journal = {Doklady Akademii Nauk}, pages = {20--24}, publisher = {mathdoc}, volume = {254}, number = {1}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1980_254_1_a3/} }
P. B. Gusyatnikov; E. S. Polovinkin. On two types of operators for biparametric equations. Doklady Akademii Nauk, Tome 254 (1980) no. 1, pp. 20-24. http://geodesic.mathdoc.fr/item/DAN_1980_254_1_a3/