Volkov, V.M. and Prakonina, A.V. 2019. Iterative realization of finite difference schemes in the fictitious domain method for elliptic problems with mixed derivatives. Journal of the Belarusian State University. Mathematics and Informatics. 1 (Apr. 2019), 69–76. DOI:https://doi.org/10.33581/2520-6508-2019-1-69-76.