@article{GDZPPN002215810, title = {Zur Existenz freier Algebren einer r-Dimensionalen Theorie.}, journal = {Manuscripta mathematica}, volume = {2}, year = {1970}, pages = {227-236}, zbl = {0203.31302}, url = {http://dml.mathdoc.fr/item/GDZPPN002215810} }
Schumacher, Dietmar. Zur Existenz freier Algebren einer r-Dimensionalen Theorie.. Manuscripta mathematica, Tome 2 (1970) pp. 227-236. http://gdmltest.u-ga.fr/item/GDZPPN002215810/