@article{DE_1991_27_12_a2,
     author = {I. M. Burkin},
     title = {On the existence of limit cycles of the second kind of multidimensional phase synchronization systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2044--2049},
     publisher = {mathdoc},
     volume = {27},
     number = {12},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_12_a2/}
}