@article{Kulik_Stepanenko_2007, title={Alternating Lyapunov functions in the theory of linear extensions of dynamical systems on a torus}, volume={59}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/3323}, abstractNote={We consider a series of problems connected with the application of quadratic-form Lyapunov functions to the investigation of the properties of regularity of linear extensions of dynamic systems on a torus.}, number={4}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Kulik, V. L. and Stepanenko, N. V.}, year={2007}, month={Apr.}, pages={488–500} }