Tensor product surfaces in ℝ 4 and Lie groups. Özkaldi, Siddika; Yayli, Yusuf — 2010 Bulletin of the Malaysian Mathematical Sciences Society. Second Series
On Mannheim partner curve in dual space. Özkaldi, Siddika; İlarslan, Kazim; Yayli, Yusuf — 2009 Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică