@article{PismaZhETF.122.513,
    title = {Topological invariant responsible for the stability of the Fermi surfaces in non-homogeneous systems$^{1)}$},
    author = {Zubkov, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {122},
    issue = {8},
    pages = {513},
    year = {2025},
    doi = {10.31857/S0370274X25100218},
    url = {http://jetpletters.ru/ps/dx/10.31857/S0370274X25100218},
}