DAEVA, S.; SETUKHA, A. On the numerical solution of the Neumann boundary value problem for the Helmholtz equation using the method of hypersingular integral equations. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), [S. l.], v. 16, n. 45, p. 421–435, 2015. DOI: 10.26089/NumMet.v16r340. Disponível em: https://en.num-meth.ru/index.php/journal/article/view/846. Acesso em: 14 dec. 2025.