A comparative study of the effects of using dynamic geometry software and physical manipulatives on the spatial visualisation skills of pre-service mathematics teachers. - Adnan Baki; Temel Kösa; Bülent Güven (Br. J. Educ. Technol., 2011)

How to Determine the Maximum Circle That Can Be Enclosed in a Convex Quadrilateral. - Adnan Baki; Erdem Çekmez; Temel Kösa (Technol. Knowl. Learn., 2014)