GREBENIČENKAITĖ, Petrė-Valda. Equations and inequalities for secondary school students. Lietuvos matematikos rinkinys, [S. l.], v. 41, n. spec., p. 356–361, 2001. DOI: 10.15388/LMR.2001.34572. Disponível em: https://www.journals.vu.lt/LMR/article/view/34572.. Acesso em: 16 aug. 2024.