@article{GDZPPN002306670, title = {Alternative Tripelsysteme.}, journal = {Mathematische Annalen}, volume = {196}, year = {1972}, pages = {205-238}, zbl = {0232.17004}, url = {http://dml.mathdoc.fr/item/GDZPPN002306670} }
Loos, Ottmar. Alternative Tripelsysteme.. Mathematische Annalen, Tome 196 (1972) pp. 205-238. http://gdmltest.u-ga.fr/item/GDZPPN002306670/