@article{GDZPPN002210231,
title = {Semi-parallelity, multi-roation surfaces and the helix-property.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {435},
year = {1993},
pages = {33-64},
zbl = {0770.53039},
url = {http://dml.mathdoc.fr/item/GDZPPN002210231}
}
Dillen, Franki; Nölker, Stefan. Semi-parallelity, multi-roation surfaces and the helix-property.. Journal für die reine und angewandte Mathematik, Tome 435 (1993) pp. 33-64. http://gdmltest.u-ga.fr/item/GDZPPN002210231/