Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1968_180_3_a6, author = {Ya. A. Roitberg}, title = {Theorems on homeomorphisms which can be realized by elliptic operators}, journal = {Doklady Akademii Nauk}, pages = {542--545}, publisher = {mathdoc}, volume = {180}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_180_3_a6/} }
Ya. A. Roitberg. Theorems on homeomorphisms which can be realized by elliptic operators. Doklady Akademii Nauk, Tome 180 (1968) no. 3, pp. 542-545. http://geodesic.mathdoc.fr/item/DAN_1968_180_3_a6/