Karavaev, A. S.; Kopysov, S. P.; Ponomarev, A. B. Algorithms for Construction and Refinement of Unstructured Quadrangle Meshes on Multiconnected Domains. ВМСС 2012, 5 (2), 144-150. https://doi.org/10.7242/1999-6691/2012.5.2.17.