@article{MAN_1965__158_161259,
     author = {R. KERKHOFF},
     title = {Eine {Konstruktion} absolut freier {Algebren.}},
     journal = {Mathematische Annalen},
     pages = {109--112},
     year = {1965},
     volume = {158},
     zbl = {0192.09402},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__158_161259/}
}