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@article{DE_1988_24_4_a31, author = {M. K. Yakovlev}, title = {Nonsmooth {Lyapunov} functions}, journal = {Differencialʹnye uravneni\^a}, pages = {720--723}, publisher = {mathdoc}, volume = {24}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a31/} }
M. K. Yakovlev. Nonsmooth Lyapunov functions. Differencialʹnye uravneniâ, Tome 24 (1988) no. 4, pp. 720-723. http://geodesic.mathdoc.fr/item/DE_1988_24_4_a31/