Biharmonic maps between doubly warped product manifolds. Perktaş, Selcen Yüksel; Kılıç, Erol — 2010 Balkan Journal of Geometry and its Applications (BJGA)
Indefinite almost paracontact metric manifolds. Tripathi, Mukut Mani; Kılıç, Erol; Perktaş, Selcen Yüksel; Keleş, Sadık — 2010 International Journal of Mathematics and Mathematical Sciences
Biharmonic curves in Lorentzian para-Sasakian manifolds. Keleş, Sadik; Perktaş, Selcen Yüksel; Kiliç, Erol — 2010 Bulletin of the Malaysian Mathematical Sciences Society. Second Series