Iwaniec, Tadeusz, Pekka Koskela, and Jani Onninen. “Mappings of Finite Distortion: Compactness”.
Annales Fennici Mathematici
27, no. 2 (August 1, 2002): 391–417. Accessed April 10, 2025. https://afm.journal.fi/article/view/135052.