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@article{DE_2001_37_6_a15, author = {G. A. Kurina}, title = {Invertibility of {Nonnegatively} {Hamiltonian} {Operators} in a {Hilbert} {Space}}, journal = {Differencialʹnye uravneni\^a}, pages = {839--841}, publisher = {mathdoc}, volume = {37}, number = {6}, year = {2001}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_2001_37_6_a15/} }
G. A. Kurina. Invertibility of Nonnegatively Hamiltonian Operators in a Hilbert Space. Differencialʹnye uravneniâ, Tome 37 (2001) no. 6, pp. 839-841. http://geodesic.mathdoc.fr/item/DE_2001_37_6_a15/