Laplace equation solutions that satisfy the zero Neumann condition on a segment of a sphere. Neliniini Kolyvannya, [S. l.], v. 18, n. 3, p. 313–322, 2015. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/789. Acesso em: 6 dec. 2025.