@article{JRAM_1969__235_150915,
     author = {Klaus W. Roggenkamp},
     title = {Grothendieck groups of hereditary orders.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {29--40},
     publisher = {mathdoc},
     volume = {235},
     year = {1969},
     zbl = {0169.35802},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1969__235_150915/}
}