TY  - JOUR
AU  - D. Papadopoulou
AU  - P. Koltsaki 
TI  - On a Special Pair of Parallel Congruences
JO  - Journal for geometry and graphics
PY  - 2006
SP  - 23
EP  - 36
VL  - 10
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JGG_2006_10_1_JGG_2006_10_1_a2/
ID  - JGG_2006_10_1_JGG_2006_10_1_a2
ER  -