Matkowski, Janusz. 2011. “Corrigendum to "A Functional Equation Characterizing Homographic Functions’’ [Annales Mathematicae Silesianae 24 (2010), 61–70]”. Annales Mathematicae Silesianae 25 (September), 101-2. https://www.journals.us.edu.pl/index.php/AMSIL/article/view/14024.