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@article{DE_1971_7_3_a7, author = {V. I. Rozhkov}, title = {The periodic solutions of autonomous systems of neutral type equations with small lag}, journal = {Differencialʹnye uravneni\^a}, pages = {446--452}, publisher = {mathdoc}, volume = {7}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_3_a7/} }
V. I. Rozhkov. The periodic solutions of autonomous systems of neutral type equations with small lag. Differencialʹnye uravneniâ, Tome 7 (1971) no. 3, pp. 446-452. http://geodesic.mathdoc.fr/item/DE_1971_7_3_a7/