Cremlyn, Richard J.; Swinbourne, Frederick J.; Graham, Stephen, Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 60, # 1.2, p. 57 - 65
Cremlyn, Richard J.; Swinbourne, Frederick J.; Graham, Stephen, Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 60, # 1.2, p. 57 - 65