@article{AIHPA_1987__47_3_221_0,
     author = {Ginibre, J. and Velo, G.},
     title = {Conformal invariance and time decay for non linear wave equations. {I}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {221--261},
     publisher = {Gauthier-Villars},
     volume = {47},
     number = {3},
     year = {1987},
     mrnumber = {921307},
     zbl = {0644.35067},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1987__47_3_221_0/}
}