Pratsiovytyi, M. V., and V. Shkol’nyi O. 1997. “One Class of Singular Complex-Valued Random Variables of the Jessen-Wintner Type”. Ukrains’kyi Matematychnyi Zhurnal 49 (12): 1653–1660. https://umj.imath.kiev.ua/index.php/umj/article/view/5170.