@article{02201537, title = {On isotropic congruences of lines in elliptic three-space.}, journal = {Mathematica Pannonica}, volume = {16}, year = {2005}, pages = {119-135}, zbl = {1082.53015}, language = {en}, url = {http://dml.mathdoc.fr/item/02201537} }
Odehnal, Boris. On isotropic congruences of lines in elliptic three-space.. Mathematica Pannonica, Tome 16 (2005) pp. 119-135. http://gdmltest.u-ga.fr/item/02201537/