del Pino, Manuel, Monica Musso, Frank Pacard, and Angela Pistoia. “Torus Action on S^n and Sign Changing Solutions for Conformally Invariant Equations”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 12, no. 1 (March 26, 2013): 209-237. Accessed May 26, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/295.