@article{GDZPPN002485729, title = {Zur globalen Raumkinematik.}, journal = {Monatshefte f\"ur Mathematik}, volume = {104}, year = {1987}, pages = {289-302}, zbl = {0624.53006}, url = {http://dml.mathdoc.fr/item/GDZPPN002485729} }
Pottmann, Helmut. Zur globalen Raumkinematik.. Monatshefte für Mathematik, Tome 104 (1987) pp. 289-302. http://gdmltest.u-ga.fr/item/GDZPPN002485729/