Pieronkiewicz, B. and Tanton, J. 2019. Different ways of solving quadratic equations. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia. 11, (Feb. 2019), 103–125. DOI:https://doi.org/10.24917/20809751.11.6.