KOLESOV, A. Yu.; MISHCHENKO, E. F.; ROZOV, N. Kh. On one bifurcation in relaxation systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 1, p. 63–72, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3137. Acesso em: 6 dec. 2025.