Metafune, Giorgio, Motohiro Sobajima, and Chiara Spina. “Elliptic and Parabolic Problems for a Class of Operators With Discontinuous Coefficients”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 19, no. 2 (June 3, 2019): 601-654. Accessed May 27, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/640.