@article{DE_1983_19_4_a34,
     author = {S. Yu. Pilyugin},
     title = {Letter to the editors: {{\textquotedblleft}Boundary} of the attracting set of a periodic {Axiom} {A-system{\textquotedblright}} {[Differentsial'nye} {Uravneniya} 17 (1981), no.~9, 1621{\textendash}1629; {MR} 83d:58052]},
     journal = {Differencialʹnye uravneni\^a},
     pages = {729},
     year = {1983},
     volume = {19},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_4_a34/}
}