Baricz, Árpád, Saminathan Ponnusamy, and Csaba Varga. “Julia’s Lemma on the Hyperbolic Disk”.
Annales Fennici Mathematici
40, no. 2 (August 1, 2015): 939–948. Accessed April 4, 2025. https://afm.journal.fi/article/view/135580.