@article{ASNSP_1998_4_27_2_289_0,
     author = {Prizzi, Martino},
     title = {Realizing vector fields without loss of derivatives},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {289--307},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 27},
     number = {2},
     year = {1998},
     mrnumber = {1664690},
     zbl = {0937.35090},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1998_4_27_2_289_0/}
}