@article{GDZPPN002022540, title = {Additive Inhaltsmasse im positiv gekr\"ummten Raum. (Short Communication).}, journal = {Aequationes mathematicae}, volume = {1}, year = {1968}, pages = {308-309}, zbl = {0175.49103}, url = {http://dml.mathdoc.fr/item/GDZPPN002022540} }
Maier, W.; Effenberger, A. Additive Inhaltsmasse im positiv gekrümmten Raum. (Short Communication).. Aequationes mathematicae, Tome 1 (1968) pp. 308-309. http://gdmltest.u-ga.fr/item/GDZPPN002022540/