@article{DE_1966_2_12_a2,
     author = {R. M. Nasyrov},
     title = {Stability on a finite time-interval in the case of one nullroot and a pair of purely imaginary roots},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1561--1571},
     publisher = {mathdoc},
     volume = {2},
     number = {12},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_12_a2/}
}