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@article{DE_1991_27_5_a6, author = {Yu. V. Malyshev and V. P. Zakharov}, title = {Linear generalized {Lyapunov} functions and limit cycles}, journal = {Differencialʹnye uravneni\^a}, pages = {777--781}, publisher = {mathdoc}, volume = {27}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a6/} }
Yu. V. Malyshev; V. P. Zakharov. Linear generalized Lyapunov functions and limit cycles. Differencialʹnye uravneniâ, Tome 27 (1991) no. 5, pp. 777-781. http://geodesic.mathdoc.fr/item/DE_1991_27_5_a6/