@article{PismaZhETF.111.249,
    title = {Four-fold anisotropy of the parallel upper critical magnetic field\\ in a pure layered $\boldsymbol{d}$-wave superconductor at  $\boldsymbol{T = 0}$},
    author = {Lebed, A. G. and Sepper, O.},
    journal = {Письма в ЖЭТФ},
    volume = {111},
    issue = {4},
    pages = {249},
    year = {2020},
    doi = {10.31857/S0370274X20040098},
    url = {http://jetpletters.ru/ps/dx/10.31857/S0370274X20040098},
    note = {[JETP Letters 111, 239 (2020)]}
}