Ouryupin, Andrei B.; Komissarov, Vladimir Yu.; Petrovskii, Pavel V., Phosphorus, Sulfur and Silicon and the Related Elements, 1995, vol. 103, # 1-4, p. 215 - 224
Ouryupin, Andrei B.; Komissarov, Vladimir Yu.; Tseryapkin, Vladimir A., Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 77, # 1-4, p. 202