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@article{DE_1978_14_9_a0, author = {M. M. Baitman}, title = {Switching lines on the plane}, journal = {Differencialʹnye uravneni\^a}, pages = {1539--1551}, publisher = {mathdoc}, volume = {14}, number = {9}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1978_14_9_a0/} }
M. M. Baitman. Switching lines on the plane. Differencialʹnye uravneniâ, Tome 14 (1978) no. 9, pp. 1539-1551. http://geodesic.mathdoc.fr/item/DE_1978_14_9_a0/