S. Trudinger, Neil, and Xu-Jia Wang. “On the Second Boundary Value Problem for Monge-Ampère Type Equations and Optimal Transportation”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 8, no. 1 (March 26, 2009): 143-174. Accessed February 20, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/171.