1. H.R. Penton, Polyphosphazenes: performance polymers for specialty applications, in: M. Zeldin, K.J. Wynne, H.R. Allcock (Eds.), Inorganic and Organometallic Polymers, vol. 360, ACS Symposium Series, Washington, DC, USA, 1988, Chapter 21, pp. 277–282.
2. D.F. Lohr, H.R. Penton, Phosphazene elastomers, in: A.K. Bhowmick, H.L. Stephen (Eds.), Handbook of Elastomers. New Developments and Technology, Marcel Dekker, New York, 1988, Chapter 16, pp. 535–550.
3. High Polymeric Organophosphazenes — Macromolecules with a Difference
4. Synthesis of Open-Chain Poly(difluorophosphazene) and Its Reactions with Alkoxides, Aryloxides, and Amines
5. H.R. Allcock, Phosphorus–Nitrogen Compounds. Cyclic, Linear, and High Polymeric Systems, Academic Press, New York, USA, 1972, Appendix II, p. 399.