@article{DE_1974_10_11_a8,
     author = {G. S. Krechetov},
     title = {Preservation of the property of stability in the presence of two zero roots and a line of equilibrium},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1993--2000},
     publisher = {mathdoc},
     volume = {10},
     number = {11},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_11_a8/}
}