@article{DE_1974_10_3_a3,
     author = {S. M. Labovski},
     title = {A condition for the nonvanishing of the {Wronskian} of a fundamental system of solutions of a linear differential equation with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {426--430},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_3_a3/}
}