Abdelguerfi, M.. Eskicioglu, R. Liebowitz, J. "Knowledge engineerin The Electrical Engineering Handbook Ed. Richard C. Dorf Boca Raton CRC Press llc. 2000Abdelguerfi, M., Eskicioglu, R., Liebowitz, J. “Knowledge Engineering” The Electrical Engineering Handbook Ed. Richard C. Dorf Boca Raton: CRC Press LLC, 2000