Harmonic functions starlike of the complex order Sibel Yalçin; Metin Öztürk — 2006 Matematički Vesnik
Univalent harmonic mappings convex in one direction. Öztürk, Metin — 2003 Acta Mathematica Universitatis Comenianae. New Series
On univalent harmonic functions. Öztürk, Metin; Yalçin, Sibel — 2002 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
On the subclass of Salagean-type harmonic univalent functions. Yalçin, Sibel; Öztürk, Metin; Yamankaradeniz, Mümin — 2007 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
On harmonic functions constructed by the Hadamard product. Öztürk, Metin; Yalçin, Sibel; Yamankaradeniz, Mümin — 2002 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]