@article{DE_1988_24_12_a10,
     author = {E. K. Makarov},
     title = {Sets of irregularity of linear systems with a parameter multiplying the derivative},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2091--2098},
     publisher = {mathdoc},
     volume = {24},
     number = {12},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_12_a10/}
}