JANUŠKEVIČIUS, Romanas; JANUŠKEVIČIENĖ, Olga. On stability estimations without any conditions of symmetry. Lietuvos matematikos rinkinys, [S. l.], v. 46, n. spec., p. 439–441, 2023. DOI: 10.15388/LMR.2006.30793. Disponível em: https://www.journals.vu.lt/LMR/article/view/30793.. Acesso em: 17 may. 2024.