@article{DE_1976_12_7_a11,
     author = {O. M. Yudrups},
     title = {Comparison of equivalences of dynamical systems on the plane},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1247--1255},
     publisher = {mathdoc},
     volume = {12},
     number = {7},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_7_a11/}
}