Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2013_94_4_a13, author = {A. {\CYRF}. Belyaev}, title = {Sungular {Perturbations} of {Powers} of the {Laplacian} on the {Torus}}, journal = {Matemati\v{c}eskie zametki}, pages = {632--636}, publisher = {mathdoc}, volume = {94}, number = {4}, year = {2013}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2013_94_4_a13/} }
A. Ф. Belyaev. Sungular Perturbations of Powers of the Laplacian on the Torus. Matematičeskie zametki, Tome 94 (2013) no. 4, pp. 632-636. http://geodesic.mathdoc.fr/item/MZM_2013_94_4_a13/