@article{ZVMMF_1981_21_6_a6,
     author = {V. V. Zaika and S. M. Shvartin},
     title = {Numerical characteristics of matrix cycles},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1423--1429},
     publisher = {mathdoc},
     volume = {21},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1981_21_6_a6/}
}