GRYSHCHUK , S. V. Monogenic functions with values in commutative complex algebras of the second rank with unity and the generalized biharmonic equation with double characteristics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 1, p. 14–23, 2022. DOI: 10.37863/umzh.v74i1.6948. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6948. Acesso em: 5 dec. 2025.