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@article{DE_1968_4_4_a13, author = {A. M. Stakhy}, title = {The returnability of points and regions in partially ordered dynamical systems}, journal = {Differencialʹnye uravneni\^a}, pages = {693--701}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_4_a13/} }
A. M. Stakhy. The returnability of points and regions in partially ordered dynamical systems. Differencialʹnye uravneniâ, Tome 4 (1968) no. 4, pp. 693-701. http://geodesic.mathdoc.fr/item/DE_1968_4_4_a13/