@article{DE_1984_20_9_a25,
     author = {V. I. Mironenko},
     title = {Reflecting function and classification of periodic differential systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1635--1638},
     publisher = {mathdoc},
     volume = {20},
     number = {9},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_9_a25/}
}