Leistner, Thomas, and Pawel Nurowski. “Ambient Metrics With Exceptional Holonomy”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 11, no. 2 (July 3, 2012): 407-436. Accessed February 20, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/270.