@incollection{AST_1980__75-76__219_0,
     author = {Sussmann, Hector J.},
     title = {Les semi-groupes sous-analytiques et la r\'egularit\'e des commandes en boucle ferm\'ee},
     booktitle = {Analyse des syst\`emes},
     author = {Collectif},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {75-76},
     year = {1980},
     pages = {219-226},
     zbl = {0459.93036},
     mrnumber = {581717},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1980__75-76__219_0}
}

Sussmann, Hector J. Les semi-groupes sous-analytiques et la régularité des commandes en boucle fermée, in Analyse des systèmes, Astérisque, no. 75-76 (1980), pp. 219-226. http://www.numdam.org/item/AST_1980__75-76__219_0/