@article{VSGU_2021_27_3_a5,
     author = {V. M. Savchin and P. T. Trinh},
     title = {On discrete systems with potential operators},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {74--82},
     year = {2021},
     volume = {27},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2021_27_3_a5/}
}