Bakhtin, A. K. “Some Problems in the Theory of Nonoverlapping Domains”.
Ukrains’kyi Matematychnyi Zhurnal
51, no. 6 (June 25, 1999): 723–731. Accessed April 27, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/4659
.