Balogh, Zoltán M., Katrin Fässler, and Ioannis D. Platis. “Modulus Method and Radial Stretch Map in the Heisenberg Group”. Annales Fennici Mathematici 38, no. 1 (February 1, 2013): 149–180. Accessed November 22, 2024. https://afm.journal.fi/article/view/135428.