@article{DE_1973_9_4_a7,
     author = {S. Yu. Pilyugin},
     title = {The phase diagrams of systems of differential equations that satisfy axiom~$A$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {647--649},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_4_a7/}
}