Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1985_280_4_a4, author = {S. Z. Levendorskii}, title = {Spectral asymptotics of degenerate systems}, journal = {Doklady Akademii Nauk}, pages = {793--796}, publisher = {mathdoc}, volume = {280}, number = {4}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1985_280_4_a4/} }
S. Z. Levendorskii. Spectral asymptotics of degenerate systems. Doklady Akademii Nauk, Tome 280 (1985) no. 4, pp. 793-796. http://geodesic.mathdoc.fr/item/DAN_1985_280_4_a4/