Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1981__91_178012, author = {P. Kirschenhofer and G. Baron}, title = {Operatorenkalk\"ul \"uber freien {Monoiden} {I:} {Strukturen.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {89--104}, publisher = {mathdoc}, volume = {91}, year = {1981}, zbl = {0447.05006}, url = {http://geodesic.mathdoc.fr/item/MOMA_1981__91_178012/} }
P. Kirschenhofer; G. Baron. Operatorenkalkül über freien Monoiden I: Strukturen.. Monatshefte für Mathematik, Tome 91 (1981), pp. 89-104. http://geodesic.mathdoc.fr/item/MOMA_1981__91_178012/