GRYSHCHUK, S. V.; PLAKSA, S. A. Monogenic functions in a biharmonic algebra. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 12, p. 1587–1596, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3125. Acesso em: 27 apr. 2025.