@article{01221433,
title = {Closed space curves of constant curvature consisting of arcs of circular helices.},
journal = {Journal for Geometry and Graphics},
volume = {2},
year = {1998},
pages = {17-31},
zbl = {1006.53002},
language = {en},
url = {http://dml.mathdoc.fr/item/01221433}
}
Koch, Richard; Engelhardt, Christoph. Closed space curves of constant curvature consisting of arcs of circular helices.. Journal for Geometry and Graphics, Tome 2 (1998) pp. 17-31. http://gdmltest.u-ga.fr/item/01221433/