Kondratyuk, Y. V., and A. A. Kondratyuk. “Generalized Lindelöf Finiteness Conditions for the λ-Type of a Subharmonic Function”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 54, no. 2, Feb. 2002, pp. 276-9, https://umj.imath.kiev.ua/index.php/umj/article/view/4062.