Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1977__21_154470, author = {J\"urgen Herzog}, title = {Algebra {Retracts} and {Poincar\'e-Series.}}, journal = {Manuscripta mathematica}, pages = {307--314}, publisher = {mathdoc}, volume = {21}, year = {1977}, zbl = {0352.13013}, url = {http://geodesic.mathdoc.fr/item/MM2_1977__21_154470/} }
Jürgen Herzog. Algebra Retracts and Poincaré-Series.. Manuscripta mathematica, Tome 21 (1977), pp. 307-314. http://geodesic.mathdoc.fr/item/MM2_1977__21_154470/