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://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14024.