Dolbeault, J., J. Esteban, M. and Tarantello, G. 2009. The role of Onofri type inequalities in the symmetry properties of extremals for Caffarelli-Kohn-Nirenberg inequalities, in two space dimensions. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE. 7, 2 (May 2009), 313-341. DOI:https://doi.org/10.2422/2036-2145.2008.2.05.