@article{MZ_1967__99_170790,
     author = {Armin Thedy},
     title = {Ringe mit x(yz) = (yx)z.},
     journal = {Mathematische Zeitschrift},
     pages = {400--404},
     publisher = {mathdoc},
     volume = {99},
     year = {1967},
     zbl = {0189.33201},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__99_170790/}
}