ANGELOVA, I. Error estimates of high-order difference schemes for elliptic equations with intersecting interfaces. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 99, p. 85–109, 2009. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/114. Acesso em: 4 dec. 2024.