@article{PismaZhETF.22.234,
    title = {Angular momentum and orbital waves in the anisotropic A phase of superfluid $He^3$},
    author = {Volovik, G. E.},
    journal = {Письма в ЖЭТФ},
    volume = {22},
    issue = {4},
    pages = {234},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23307.shtml},
}