1. L. Kaufman, E.V. Clougherty, Investigation of Boride Compounds for Very High Temperature Applications, AirForce Technical Documentary Report no. RTD-TDR-63-4096, 1963.
2. I.E. Campbell, E.M. Sherwood, High-Temperature Materials and Technology. New York, 1967.
3. Evaluation of ultra-high temperature ceramics for aero-propulsion use;Levine;J. Eur. Ceram. Soc.,2002
4. Designing for ultra-high temperature applications: the mechanical and thermal properties of HfB2, HfCx, HfNx and Hf(N);Wuchina;J. Mater. Sci.,2004
5. W.G. Fahrenholtz, G.E. Hilmas Report on the NSF-AFOSR Joint Workshop on Future Ultra-High Temperature Materials, National Science Foundation Workshop, Arlington, 2004.