Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1978_24_2_a11, author = {N. N. Frolov}, title = {Essential self-adjointness of an infinite-dimensional operator}, journal = {Matemati\v{c}eskie zametki}, pages = {241--248}, publisher = {mathdoc}, volume = {24}, number = {2}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1978_24_2_a11/} }
N. N. Frolov. Essential self-adjointness of an infinite-dimensional operator. Matematičeskie zametki, Tome 24 (1978) no. 2, pp. 241-248. http://geodesic.mathdoc.fr/item/MZM_1978_24_2_a11/