参考文献

Elnagdi, Mohamed Hilmy; Sadek, Kamal Usef; El-Maghraby, Mohamed Abdallah; Selim, Maghraby Ali; Khalafallah, Ali Kamel; Reaslan, Mohamed Abd El Monem Phosphorus, Sulfur and Silicon and the Related Elements, 1995 , vol. 105, # 1-4 p. 51 - 56