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@article{DE_1983_19_9_a0, author = {A. I. Domoshnitskii}, title = {Extension of the {Sturm} theorem to equations with retarded argument}, journal = {Differencialʹnye uravneni\^a}, pages = {1475--1482}, publisher = {mathdoc}, volume = {19}, number = {9}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1983_19_9_a0/} }
A. I. Domoshnitskii. Extension of the Sturm theorem to equations with retarded argument. Differencialʹnye uravneniâ, Tome 19 (1983) no. 9, pp. 1475-1482. http://geodesic.mathdoc.fr/item/DE_1983_19_9_a0/