Kovalenko, I. L., A. I. Litvin, and S. D. Simonzhenkov. 1993. “On the Calculation of Certain Singular Integrals”. Ukrains’kyi Matematychnyi Zhurnal 45 (8): 1174–1176. https://umj.imath.kiev.ua/index.php/umj/article/view/5917.