Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1972_205_2_a1, author = {M. Sh. Birman and M. Z. Solomyak}, title = {Spectral asymptotics of nonsmooth elliptic operators}, journal = {Doklady Akademii Nauk}, pages = {267--270}, publisher = {mathdoc}, volume = {205}, number = {2}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_2_a1/} }
M. Sh. Birman; M. Z. Solomyak. Spectral asymptotics of nonsmooth elliptic operators. Doklady Akademii Nauk, Tome 205 (1972) no. 2, pp. 267-270. http://geodesic.mathdoc.fr/item/DAN_1972_205_2_a1/