El-Wassimy, M. T. M.; Abdel-Rahman, M.; Ghattas, A.-B. A. G., Phosphorus, Sulfur and Silicon and the Related Elements, 1992, vol. 70, # 1/2, p. 99 - 108
El-Wassimy, M. T. M.; Abdel-Rahman, M.; Ghattas, A.-B. A. G., Phosphorus, Sulfur and Silicon and the Related Elements, 1992, vol. 70, # 1/2, p. 99 - 108