Zhou, Qingshan, and Saminathan Ponnusamy. “Gromov Hyperbolic John Is Quasihyperbolic John I”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE (March 11, 2024): 19. Accessed March 3, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/6300.