Górowski, Jan, and Adam Łomnicki. 2017. “Iterations of Homographic Functions and Recurrence Equations Involving a Homographic Function”. Annales Universitatis Paedagogicae Cracoviensis | Studia Ad Didacticam Mathematicae Pertinentia 7 (July):27-33. https://didacticammath.uken.krakow.pl/article/view/3625.