@article{DE_1990_26_5_a8,
     author = {S. E. Reshetnikov and G. S. Rychkov},
     title = {Bifurcation values of the parameters of a system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {808--814},
     publisher = {mathdoc},
     volume = {26},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_5_a8/}
}