Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1976_12_7_a23, author = {T. I. Smagina}, title = {Regularity classes for second order vectorial equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1320--1322}, publisher = {mathdoc}, volume = {12}, number = {7}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_7_a23/} }
T. I. Smagina. Regularity classes for second order vectorial equations. Differencialʹnye uravneniâ, Tome 12 (1976) no. 7, pp. 1320-1322. http://geodesic.mathdoc.fr/item/DE_1976_12_7_a23/