@article{UZKU_2008_150_3_a8,
     author = {A. A. Litvinov and V. A. Popov},
     title = {Isometry {Group} of {Superfluids}},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {79--87},
     year = {2008},
     volume = {150},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2008_150_3_a8/}
}