@article{DE_1980_16_2_a22,
     author = {A. V. Kurnysh},
     title = {Stability of the solutions of a system of second-order linear differential equations with periodic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {370--373},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_2_a22/}
}