Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2004_76_2_a12, author = {O. A. Romanova and Ya. T. Sultanaev}, title = {Spectral {Properties} of {Differential} {Operators} of {Order~}$2N$}, journal = {Matemati\v{c}eskie zametki}, pages = {303--307}, publisher = {mathdoc}, volume = {76}, number = {2}, year = {2004}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2004_76_2_a12/} }
O. A. Romanova; Ya. T. Sultanaev. Spectral Properties of Differential Operators of Order~$2N$. Matematičeskie zametki, Tome 76 (2004) no. 2, pp. 303-307. http://geodesic.mathdoc.fr/item/MZM_2004_76_2_a12/