Hamza, H. , Maher, M. , Alaa, S. , Khattab, A. , Ismail, H. , Hosny, K.. "Ontology for Semantic Enrichment of Radio Frequency Identification Systems". World Academy of Science, Engineering and Technology, Open Science Index 106, International Journal of Computer and Information Engineering, (2015), 9(10), 2251 - 2256.