D’Aprile, Teresa, and Pierpaolo Esposito. “Equilibria of Point-Vortices on Closed Surfaces”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 17, no. 1 (March 9, 2017): 287-321. Accessed February 20, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/501.