Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1993_29_5_a5, author = {L. V. Kritskov}, title = {Distribution of the eigenvalues of singular differential operators on an interval}, journal = {Differencialʹnye uravneni\^a}, pages = {773--779}, publisher = {mathdoc}, volume = {29}, number = {5}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_5_a5/} }
L. V. Kritskov. Distribution of the eigenvalues of singular differential operators on an interval. Differencialʹnye uravneniâ, Tome 29 (1993) no. 5, pp. 773-779. http://geodesic.mathdoc.fr/item/DE_1993_29_5_a5/