Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1961_141_3_a4, author = {A. A. Dezin}, title = {The index in boundary-value problems for invariant elliptic systems}, journal = {Doklady Akademii Nauk}, pages = {535--538}, publisher = {mathdoc}, volume = {141}, number = {3}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_3_a4/} }
A. A. Dezin. The index in boundary-value problems for invariant elliptic systems. Doklady Akademii Nauk, Tome 141 (1961) no. 3, pp. 535-538. http://geodesic.mathdoc.fr/item/DAN_1961_141_3_a4/