Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1977_233_4_a6, author = {L. A. Ivanov}, title = {On lacunae for operators splitting into {Euler--Poisson--Darboux} factors}, journal = {Doklady Akademii Nauk}, pages = {535--538}, publisher = {mathdoc}, volume = {233}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_4_a6/} }
L. A. Ivanov. On lacunae for operators splitting into Euler--Poisson--Darboux factors. Doklady Akademii Nauk, Tome 233 (1977) no. 4, pp. 535-538. http://geodesic.mathdoc.fr/item/DAN_1977_233_4_a6/