@article{UFA_2021_13_2_a3,
     author = {A. V. Zhiber and M. N. Kuznetsova},
     title = {Integrals and characteristic {Lie} rings   of semi-discrete systems of equations},
     journal = {Ufa mathematical journal},
     pages = {22--32},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2021_13_2_a3/}
}