STRUCTURAL AND ELECTRICAL CONDUCTIVITY STUDIES ON 1,4 BIS (P-METHOXYBENZILIDINE) (SB) AND ITS DIPHENYL PHOSPHINE DERIVATIVE (OPSB). - Farag, R. S.; El-Sayed, B. A.; El-Nawawy, M. A.; Shaaban, S. M. (Phosphorus, Sulfur & Silicon & the Related Elements, 2004)