Ahmad, Khalid; Ahmad, Mushtaq; Weckerle, Caroline (2015). Ethnoveterinary medicinal plant knowledge and practice among the tribal communities of Thakht-e-Sulaiman hills, west Pakistan. Journal of Ethnopharmacology, 170:275-283.
Ahmad, M; Frei, K; Willscher, E; Stefanski, A; Kaulich, K; Roth, P; Stühler, K; Reifenberger, G; Binder, H; Weller, M (2014). How stemlike are sphere cultures from long-term cancer cell lines? Lessons from mouse glioma models. Journal of Neuropathology and Experimental Neurology, 73(11):1062-1077.
Ahmad, Khalid; Ahmad, Mushtaq; Weckerle, Caroline S (2013). Ethnobotanical studies of the eastern plains of Takht-E-Sulaiman hills. Pakistan Journal of Botany, 54(S1):197-205.
Ahmad, M. How stem-like are sphere cultures from long-term cancer cell lines? 2013, University of Zurich, Faculty of Medicine.