Nadine, Badr, and Ben Ali Besma. “L^p Boundedness of Riesz Transform Related to Schroedinger Operators on a Manifold ”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 8, no. 4 (December 21, 2009): 725-765. Accessed February 22, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/190.