@article{DE_1976_12_6_a21,
     author = {V. A. Tyshkevich},
     title = {On the question of the properties of the {Cauchy} matrix of a functional-differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1131--1133},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_6_a21/}
}