Duren, P.L., and M.M. Schiffer. “Goluzin Inequalities and Minimum Energy for Mappings onto Nonoverlapping Regions”. Annales Fennici Mathematici 15, no. 1 (February 1, 1990): 133–150. Accessed November 25, 2024. https://afm.journal.fi/article/view/134683.