Srivastava, T. N.; Singh, Jai Deo; Srivastava, Sanjay Kumar, Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 55, # 1-4, p. 117 - 124
Srivastava, T. N.; Singh, Jai Deo; Srivastava, Sanjay Kumar, Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 55, # 1-4, p. 117 - 124