@article{GDZPPN002428342, title = {On the Projective Class Group of Arithmetic Groups.}, journal = {Mathematische Zeitschrift}, volume = {183}, year = {1983}, pages = {339-358}, zbl = {0505.20033}, url = {http://dml.mathdoc.fr/item/GDZPPN002428342} }
Bürgisser, Balz. On the Projective Class Group of Arithmetic Groups.. Mathematische Zeitschrift, Tome 183 (1983) pp. 339-358. http://gdmltest.u-ga.fr/item/GDZPPN002428342/