@article{GDZPPN002245515, title = {Zur Theorie des Riemann'schen Kr\"ummmigsmasses}, journal = {Mathematische Annalen}, volume = {16}, year = {1880}, pages = {571-576}, zbl = {12.0570.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002245515} }
Voss. Zur Theorie des Riemann'schen Krümmmigsmasses. Mathematische Annalen, Tome 16 (1880) pp. 571-576. http://gdmltest.u-ga.fr/item/GDZPPN002245515/