Mozafari Maref, M. H., Zahiri, Seyed-Hamid (2013) ‘ Unsupervised Image Clustering Using Central Force Optimization Algorithm Unsupervised Image Clustering Using Central Force Optimization Algorithm’, Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran, 11(2), pp. 52-57. doi: