Shawali, Ahmed S.; Hassaneen, Hamdi M.; Fahmy, Abdelgawad A., Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 53, # 1-4, p. 259 - 265
Shawali, Ahmed S.; Hassaneen, Hamdi M.; Fahmy, Abdelgawad A., Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 53, # 1-4, p. 259 - 265