@article{MM2_1974__13_154267,
     author = {Gerhard Janssen},
     title = {Reelle {Jordanalgebren} mit endlicher {Spur.}},
     journal = {Manuscripta mathematica},
     pages = {237--274},
     publisher = {mathdoc},
     volume = {13},
     year = {1974},
     zbl = {0291.17011},
     url = {http://geodesic.mathdoc.fr/item/MM2_1974__13_154267/}
}