@article{MM2_1977__23_154530,
     author = {Max Koecher},
     title = {Eine {Konstruktion} von {Jordan-Algebren.}},
     journal = {Manuscripta mathematica},
     pages = {387--425},
     publisher = {mathdoc},
     volume = {23},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/MM2_1977__23_154530/}
}