BelyV. I., and KravchukE. V. “Explicit Relations for the Reduced Module and Harmonic Measure”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 4 (April 25, 1993): 576–578. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5844.