Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1995_31_1_a11, author = {G. G. Devdariani}, title = {An elliptic second-order equation with singular coefficients}, journal = {Differencialʹnye uravneni\^a}, pages = {90--93}, publisher = {mathdoc}, volume = {31}, number = {1}, year = {1995}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1995_31_1_a11/} }
G. G. Devdariani. An elliptic second-order equation with singular coefficients. Differencialʹnye uravneniâ, Tome 31 (1995) no. 1, pp. 90-93. http://geodesic.mathdoc.fr/item/DE_1995_31_1_a11/