@article{10_4007_annals_2012_176_1_6,
     author = {Rupert L. Frank and Elliott H. Lieb},
     title = {Sharp constants in several inequalities on the {Heisenberg} group},
     journal = {Annals of mathematics},
     pages = {349--381},
     year = {2012},
     volume = {176},
     number = {1},
     doi = {10.4007/annals.2012.176.1.6},
     mrnumber = {2925386},
     zbl = {1252.42023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2012.176.1.6/}
}