@article{DE_1994_30_6_a7,
     author = {A. V. Lasunsky},
     title = {On the reduction of a second-order linear system to a triangular system with identical diagonal coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {987--991},
     publisher = {mathdoc},
     volume = {30},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_6_a7/}
}