@article{05632439, title = {Mannheim offsets of ruled surfaces.}, journal = {Mathematical Problems in Engineering}, volume = {2009}, year = {2009}, doi = {10.1155/2009/160917}, zbl = {1184.53008}, language = {en}, url = {http://dml.mathdoc.fr/item/05632439} }
Orbay, Keziban; Kasap, Emin; Aydemir, İsmail. Mannheim offsets of ruled surfaces.. Mathematical Problems in Engineering, Tome 2009 (2009) . doi : 10.1155/2009/160917. http://gdmltest.u-ga.fr/item/05632439/