Tajbakhsh, Mahmood; Mohammadpoor-Baltork, Iraj; Ramzanian-Lehmali, Farhad
Phosphorus, Sulfur and Silicon and the Related Elements, 2003 , vol. 178, # 12 p. 2621 - 2625

Singh, Sushma; Kumar, Sanjeev; Sharma, Laxmi Kant; Singh
Journal of the Indian Chemical Society, 2009 , vol. 86, # 7 p. 734 - 738