Hembars’kaS. B. “Tangential Limit Values of a Biharmonic Poisson Integral in a Disk”. Ukrains’kyi Matematychnyi Zhurnal 49, no. 9 (September 25, 1997): 1171–1176. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5114.