@article{DE_2004_40_11_a7,
     author = {N. A. Magnitskii and S. V. Sidorov},
     title = {Rotor type singular points of nonautonomous systems of differential equations and their role in the generation of singular attractors of nonlinear autonomous systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1500--1514},
     publisher = {mathdoc},
     volume = {40},
     number = {11},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_11_a7/}
}