BARAN, M.; OZORKA, P. On identities for derivative operators. Science, Technology and Innovation, [S. l.], v. 7, n. 4, p. 13–16, 2019. DOI: 10.5604/01.3001.0013.7230. Disponível em: https://journals.anstar.edu.pl/index.php/sti/article/view/271. Acesso em: 2 may. 2024.