@article{DE_1991_27_2_a6,
     author = {M. T. Terekhin},
     title = {Conditions for the existence of a singular value of the parameter of a system of ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {238--242},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_2_a6/}
}