On the dual Darboux rotation axis of the timelike dual space curve. Yücesan, Ahmet; Çöken, A.Ceylan; Ayyildiz, Nihat — 2002 Balkan Journal of Geometry and its Applications (BJGA)
Differential-geometrical conditions between geodesic curves and ruled surfaces in the Lorentz space. Ayyildiz, Nihat; Çöken, A.Ceylan; Yücesan, Ahmet — 2002 Balkan Journal of Geometry and its Applications (BJGA)