@article{JRAM_1989__398_153147,
     author = {Helmut Koch and Boris B. Venkov},
     title = {\"Uber ganzzahlige unimodulare euklidische {Gitter.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {144--168},
     publisher = {mathdoc},
     volume = {398},
     year = {1989},
     zbl = {0667.10020},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__398_153147/}
}