@article{AIHPA_1989__51_2_221_0,
     author = {Ginibre, J. and Velo, G.},
     title = {Commutator expansions and smoothing properties of generalized {Benjamin-Ono} equations},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {221--229},
     publisher = {Gauthier-Villars},
     volume = {51},
     number = {2},
     year = {1989},
     mrnumber = {1033618},
     zbl = {0705.35126},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1989__51_2_221_0/}
}