[1]
M. M. Astaf’eva and N. V. Stepanenko, “Sets of linear expansions of dynamical systems on a torus for a fixed Lyapunov function”, Ukr. Mat. Zhurn., vol. 59, no. 12, pp. 1707–1713, Dec. 2007, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3425