@article{DE_1985_21_11_a5,
     author = {G. S. Krechetov},
     title = {Stability of a system of the first class with zero first diagonal coefficient},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1891--1898},
     publisher = {mathdoc},
     volume = {21},
     number = {11},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_11_a5/}
}