JANUŠKEVIČIUS, Romanas. On the stability estimation of Wang’s characterization theorem. Lietuvos matematikos rinkinys, [S. l.], v. 42, n. spec., p. 697–700, 2002. DOI: 10.15388/LMR.2002.33059. Disponível em: https://www.journals.vu.lt/LMR/article/view/33059.. Acesso em: 1 jul. 2024.