@article{DE_2004_40_10_a4,
     author = {V. V. Mironenko},
     title = {Time symmetry preserving perturbations of differential systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1325--1332},
     year = {2004},
     volume = {40},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_10_a4/}
}