Cheng, Jih-Hsin, Jenn-Fang Hwang, Andrea Malchiodi, and Paul Yang. 2009. “Minimal Surfaces in Pseudohermitian Geometry”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 4 (1):129-77. https://doi.org/10.2422/2036-2145.2005.1.05.