Kalinets, R. Z., and Yu. A. Koval’chuk. “On the Regularity of the Growth of the Modulus and Argument of an Entire Function in the Metric of $L^p [0, 2π]$”. Ukrains’kyi Matematychnyi Zhurnal, vol. 50, no. 7, July 1998, pp. 889-96, https://umj.imath.kiev.ua/index.php/umj/article/view/4869.