@article{MZ_1968__103_170887,
     author = {Karl-Heinz Helwig},
     title = {\"Uber {Mutationen} von {Jordan-Algebren.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {103},
     year = {1968},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__103_170887/}
}