@article{DE_1989_25_10_a9,
     author = {V. V. Sergeichuk},
     title = {Pseudolinear matrix pencils and systems of linear differential equations with meromorphic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1721--1727},
     publisher = {mathdoc},
     volume = {25},
     number = {10},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_10_a9/}
}