Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1994_30_10_a21, author = {F. G. Maksudov and Z. I. Ismailov}, title = {Normal extensions of second-order differential operators}, journal = {Differencialʹnye uravneni\^a}, pages = {1823--1824}, publisher = {mathdoc}, volume = {30}, number = {10}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1994_30_10_a21/} }
F. G. Maksudov; Z. I. Ismailov. Normal extensions of second-order differential operators. Differencialʹnye uravneniâ, Tome 30 (1994) no. 10, pp. 1823-1824. http://geodesic.mathdoc.fr/item/DE_1994_30_10_a21/