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@article{DE_1974_10_3_a4, author = {N. P. Prikhod'ko}, title = {The cyclic trajectories of systems with switching}, journal = {Differencialʹnye uravneni\^a}, pages = {431--435}, publisher = {mathdoc}, volume = {10}, number = {3}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1974_10_3_a4/} }
N. P. Prikhod'ko. The cyclic trajectories of systems with switching. Differencialʹnye uravneniâ, Tome 10 (1974) no. 3, pp. 431-435. http://geodesic.mathdoc.fr/item/DE_1974_10_3_a4/