AZIZOV, M. On the complexity of boundary integral equations with analytic coefficients with logarithmic singularities. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 10, p. 1299–1310, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5215. Acesso em: 5 dec. 2025.