SHARKO, Yu. V. Quantization of Lyapunov functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 9, p. 1294–1296, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2955. Acesso em: 11 apr. 2025.