BELEVTSOV, N. A Multipole algorithm for solving a fractional generalization of the helmholtz equation. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), [S. l.], v. 22, n. 68, p. 109–120, 2021. DOI: 10.26089/NumMet.v22r208. Disponível em: https://en.num-meth.ru/index.php/journal/article/view/1148. Acesso em: 19 apr. 2024.