@article{ELMA_1967__22_140833,
     author = {J. Spilker},
     title = {\"Uber eine {Vertauschbarkeit} von {Addition} und {Multiplikation.}},
     journal = {Elemente der Mathematik},
     pages = {12--13},
     publisher = {mathdoc},
     volume = {22},
     year = {1967},
     zbl = {0144.24902},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1967__22_140833/}
}