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@article{MZM_1999_66_4_a18, author = {V. P. Maslov}, title = {On the superfluidity of liquid helium}, journal = {Matemati\v{c}eskie zametki}, pages = {630--632}, publisher = {mathdoc}, volume = {66}, number = {4}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_4_a18/} }
V. P. Maslov. On the superfluidity of liquid helium. Matematičeskie zametki, Tome 66 (1999) no. 4, pp. 630-632. http://geodesic.mathdoc.fr/item/MZM_1999_66_4_a18/
[1] Maslov V. P., Operatornye metody, Nauka, M., 1973