On harmonic univalent functions defined by a generalized Ruscheweyh derivatives operator. Darus, Maslina; Al-Shaqsi, Khalifa — 2006 Lobachevskii Journal of Mathematics
A new subclass of Salagean-type harmonic univalent functions. Al-Shaqsi, Khalifa; Darus, Maslina; Fadipe-Joseph, Olubunmi Abidemi — 2010 Abstract and Applied Analysis