@article{DE_1993_29_4_a19,
     author = {L. Z. Fishman},
     title = {Criteria for risky and safe bounds for discrete systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {723--724},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_4_a19/}
}