@article{DE_1978_14_12_a22,
     author = {K. K. Iskra},
     title = {An integration method for normal systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2272--2275},
     publisher = {mathdoc},
     volume = {14},
     number = {12},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_12_a22/}
}