E. H. Alallaf, D., H. Alsoofe, H. and N.T. Alkymakchy, D. 2013. The impact of design concepts on thinking performance in urban design studio. Al-Rafidain Engineering Journal (AREJ). 21, 2 (Apr. 2013), 99–117. DOI:https://doi.org/10.33899/rengj.2013.72808.