V.L. Makarov, Gavrilyuk IP. The fictitious domain method and homotopy as a new alternative for multidimensional partial differential equations in domains of any shape. Ukr. Mat. Zhurn. [Internet]. 2020Feb.15 [cited 2024May3];72(2):191-08. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1101