Buldygin, V. V., and V. V. Pavlenkov. “Karamata Theorem for Regularly Log-Periodic Functions”. Ukrains’kyi Matematychnyi Zhurnal 64, no. 11 (November 25, 2012): 1443-1463. Accessed March 28, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2672.