Cremlyn, Richard J.; Swinbourne, Frederick J.; Bassin, Paul, Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 63, # 3/4, p. 385 - 396
Cremlyn, Richard J.; Swinbourne, Frederick J.; Bassin, Paul, Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 63, # 3/4, p. 385 - 396