1. Sobhy, M.: ‘Electromagnetic wave propagation in periodically loaded waveguides containing ferrimagnetic media’, 1966, Ph.D. thesis, University of Leeds
2. Sobhy, M., and Clarricoats, P.I.B.: ‘Propagation in periodically loaded waveguides containing ferrimagnetic material’, The microwave behaviour of ferrimagnetics and plasmas, 1965), p. 28/1–28/3IEE Conf. Publ. 13