del Pino M, Musso M, Pacard F, Pistoia A. Torus action on S^n and sign changing solutions for conformally invariant equations. Annali Scienze [Internet]. 2013Mar.26 [cited 2025May27];12(1):209-37. Available from: http://20.103.181.36/index.php/annaliscienze/article/view/295