Surfaces at a constant distance from the edge of regression on a surface. - Ömer Tarakci; H. Hilmi Hacisalihoglu (Appl. Math. Comput., 2004)

On the quaternionic B2 slant helices in the semi-Euclidean space E24. - Ferdag Kahraman; Ismail Gök; H. Hilmi Hacisalihoglu (Appl. Math. Comput., 2012)

The Gauss Map and the Third Laplace-Beltrami Operator of the Rotational Hypersurface in 4-Space. - Erhan Güler; H. Hilmi Hacisalihoglu; Young Ho Kim (Symmetry, 2018)