Chronowski, Antoni. “Creative Mathematical Mental Activity of Students While Solving Problems Requiring Use of Vieta’s Formulas II”. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia 12 (December 24, 2020): 109–121. Accessed May 8, 2024. https://didacticammath.uken.krakow.pl/article/view/8351.