Reddy, M. V. Ramana; Reddy, D. Bhaskar; Reddy, P. V. Ramana, Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 53, # 1-4, p. 285 - 290
Reddy, M. V. Ramana; Reddy, D. Bhaskar; Reddy, P. V. Ramana, Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 53, # 1-4, p. 285 - 290