@article{AIF_2011__61_5_1807_0,
     author = {Clerc, Jean-Louis and {\O}rsted, Bent},
     title = {Conformally invariant trilinear forms on the sphere},
     journal = {Annales de l'Institut Fourier},
     pages = {1807--1838},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {61},
     number = {5},
     year = {2011},
     doi = {10.5802/aif.2659},
     zbl = {1252.22008},
     mrnumber = {2961841},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.2659/}
}