1. J. van Wazer, Phosphorous and its Compounds, vols. 1 and 2, Interscience, New York, 1951
2. A.E.R. Westman, in: Modern Aspects of Vitreous State vol. 1, ed. J.D. Mackenzie, Butterworths, London, 1960, p. 63
3. The Raman spectra and structure of pure vitreous P2O5
4. A. Wright, A. Clare, D. Crimley, R. Hulmes, S. Martin, Paper 64-G-89F at the Glass Meeting of the American Ceramic Society, Orlando, FL, 17–20 September 1989