@article{DE_1994_30_6_a3,
     author = {M. V. Dolov and A. A. Alekseev},
     title = {On the absence of limit cycles in dynamical systems with an integrating factor of a special type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {947--954},
     publisher = {mathdoc},
     volume = {30},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_6_a3/}
}