Involute-evolute curve couples in the Euclidean 4-space. Özyilmaz, Emin; Yilmaz, Süha — 2009 International Journal of Open Problems in Computer Science and Mathematics. IJOPCM
New spherical indicatrices and their characterizations. Yilmaz, Süha; Özyilmaz, Emin; Turgut, Melih — 2010 Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică