@article{GDZPPN002055503,
title = {Abwickelbare Schiebfl\"achen in Rn.},
journal = {Commentarii mathematici Helvetici},
volume = {24},
year = {1950},
pages = {64-67},
zbl = {0036.11501},
url = {http://dml.mathdoc.fr/item/GDZPPN002055503}
}
Pinl, M. Abwickelbare Schiebflächen in Rn.. Commentarii mathematici Helvetici, Tome 24 (1950) pp. 64-67. http://gdmltest.u-ga.fr/item/GDZPPN002055503/