@article{DE_1972_8_11_a23,
     author = {G. S. Krechetov},
     title = {Perturbations that preserve the property of stability},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2090--2092},
     publisher = {mathdoc},
     volume = {8},
     number = {11},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_11_a23/}
}