@article{MSH_1963__4__3_0,
author = {Sch\"utzenberger, Marcel-Paul},
title = {Sur les contraintes d\'efinissant certains mod\`eles formels de langage},
journal = {Math\'ematiques et Sciences humaines},
volume = {4},
year = {1963},
pages = {3-8},
language = {fr},
url = {http://dml.mathdoc.fr/item/MSH_1963__4__3_0}
}
Schützenberger, M. P. Sur les contraintes définissant certains modèles formels de langage. Mathématiques et Sciences humaines, Tome 4 (1963) pp. 3-8. http://gdmltest.u-ga.fr/item/MSH_1963__4__3_0/
and Introduction to the formal analysis of natural languages in "Handbook of Mathematical Psychology", Bush, Gallanter & Luce, Ed., 1962 (Wiley - N.Y.).