@article{PismaZhETF.109.369,
    title = {Tetrads and $\boldsymbol{q}$-theory },
    author = {Klinkhamer, F. R. and Volovik, G. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {109},
    issue = {6},
    pages = {369},
    year = {2019},
    doi = {10.1134/S0370274X19060043},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19060043},
}