@article{PDM_2021_2_a7,
     author = {P. A. Myshkis and A. G. Tatashev and M. V. Yashina},
     title = {Discrete closed one-particle chain of contours},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {114--125},
     publisher = {mathdoc},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2021_2_a7/}
}