Astala, Kari, Daniel Faraco, and László Székelyhidi Jr. “Convex Integration and the L^p Theory of Elliptic Equations”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 7, no. 1 (May 5, 2009): 1-50. Accessed May 30, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/142.