Błaszczyk, P., and K. Mrówka. “Euclid, Elements, Book II. Translated into Polish from the Text of Heiberg”. Annales Universitatis Paedagogicae Cracoviensis | Studia Ad Didacticam Mathematicae Pertinentia, vol. 12, Dec. 2020, pp. 265-79, doi:10.24917/20809751.12.12.