SZCZEPAŃSKI, J. Polynomial approximation of regular functions of a quaternionic variable. Science, Technology and Innovation, [S. l.], v. 16, n. 3-4, p. 28–41, 2023. DOI: 10.55225/sti.441. Disponível em: https://journals.anstar.edu.pl/index.php/sti/article/view/441. Acesso em: 22 may. 2024.