Tarasyuk S. І. “Integral Mean δ-Subharmonic Functions and Classes of Almost Regularly Increasing”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 3 (April 2, 1992): 408-416. Accessed September 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8110.