@article{DE_1974_10_7_a19,
     author = {N. N. Butenina},
     title = {On the theory of bifurcations of dynamical systems under a rotation of the field},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1322--1324},
     publisher = {mathdoc},
     volume = {10},
     number = {7},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_7_a19/}
}