@article{JETPL.115.306,
    title = {},
    author = {Volovik, G. E.},
    journal = {JETP Lett.},
    volume = {115},
    issue = {5},
    pages = {276},
    year = {2022},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.31857/S1234567822050068},
    note = {[Pisma v ZhETF 115, 306 (2022)]}
}