BESLER, G. Gottlob Frege on numbers. An attempt to determine the role of the history of mathematics in the work of philosophers. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 53, p. 133–164, 2013. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/60. Acesso em: 25 sep. 2022.