Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1967_172_4_a2, author = {B. R. Vainberg and V. V. Grushin}, title = {Uniformly non-coercive problems for elliptic equations}, journal = {Doklady Akademii Nauk}, pages = {759--762}, publisher = {mathdoc}, volume = {172}, number = {4}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_172_4_a2/} }
B. R. Vainberg; V. V. Grushin. Uniformly non-coercive problems for elliptic equations. Doklady Akademii Nauk, Tome 172 (1967) no. 4, pp. 759-762. http://geodesic.mathdoc.fr/item/DAN_1967_172_4_a2/