Elghandour, Ahmed H. H.; Zohdi, Hussein F.; Afeefy, Hussein Y., Phosphorus, Sulfur and Silicon and the Related Elements, 1992, vol. 70, # 3/4, p. 297 - 302
Elghandour, Ahmed H. H.; Zohdi, Hussein F.; Afeefy, Hussein Y., Phosphorus, Sulfur and Silicon and the Related Elements, 1992, vol. 70, # 3/4, p. 297 - 302