RASSIAS, John Michael. On approximation of approximately quadratic mappings by quadratic mappings. Annales Mathematicae Silesianae, [S. l.], v. 15, p. 67–78, 2001. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14116. Acesso em: 2 jul. 2025.