@article{BSMF_1981__109__3_0,
     author = {Fliess, Michel},
     title = {Fonctionnelles causales non lin\'eaires et ind\'etermin\'ees non commutatives},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {3--40},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {109},
     year = {1981},
     doi = {10.24033/bsmf.1931},
     mrnumber = {82h:93037},
     zbl = {0476.93021},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1931/}
}