@article{MZ_1967__102_170870,
     author = {G\"unter H. Wenzel},
     title = {Konstanten in endlichen, freien universellen {Algebren.}},
     journal = {Mathematische Zeitschrift},
     pages = {205--215},
     year = {1967},
     volume = {102},
     zbl = {0229.08010},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__102_170870/}
}