Kaup, Wilhelm. “On the CR-Structure of Certain Linear Group Orbits in Infinite Dimensions”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 3, no. 3 (December 14, 2009): 535-554. Accessed May 26, 2026. https://journals-dev.sns.it/index.php/annaliscienze/article/view/47.