@article{DE_1968_4_2_a19,
     author = {I. I. Martynov},
     title = {Sufficient conditions for the regularity and reducibility of systems close to periodic ones},
     journal = {Differencialʹnye uravneni\^a},
     pages = {370--374},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_2_a19/}
}