Lahti, Panu, Xining Li, and Zhuang Wang. “Traces of Newtonian-Sobolev, Hajlasz-Sobolev, and BV Functions on Metric Spaces”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 22, no. 3 (September 27, 2021): 1353-1383. Accessed May 26, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/868.