Soliman, Fouad M.; Khalil, Khairia M.; Elnaem, Shweekar I., Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 60, # 3/4, p. 183 - 187
Soliman, Fouad M.; Khalil, Khairia M.; Elnaem, Shweekar I., Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 60, # 3/4, p. 183 - 187