@article{JRAM_1952__190_150216,
     author = {H.F.J. L\"owig},
     title = {On the properties of freely generated algebras.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {65--74},
     publisher = {mathdoc},
     volume = {190},
     year = {1952},
     zbl = {0049.01705},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1952__190_150216/}
}