Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1957_114_6_a6, author = {S. G. Krein}, title = {On correctness classes for certain boundary problems}, journal = {Doklady Akademii Nauk}, pages = {1162--1165}, publisher = {mathdoc}, volume = {114}, number = {6}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_6_a6/} }
S. G. Krein. On correctness classes for certain boundary problems. Doklady Akademii Nauk, Tome 114 (1957) no. 6, pp. 1162-1165. http://geodesic.mathdoc.fr/item/DAN_1957_114_6_a6/