1. P.A. Kinzie, Thermocouple Temperature Measuring (New York: Wiley — Interscience Publication, 1973).
2. J.C. Lackman and J.A. Mc Gurty, The Use of Refractory Metals for Ultra High-Temperature Thermocouples, in Temperature Its Measurement and Control in Science and Industry, ed. C.M. Herzfeld (New York: Reinhold, 1962), Vol. III, p. 177.
3. R.I. Jaffee, C.T. Sims, and J.J. Hardwood, “The Effect of Rhenium on the Fabrication and Ductility of Molybdenum and Tungsten,” Proc. 3rd Plansee-Seminar Proceedings (Reutte, Austria: Plansee Group, 1958), pp. 380–410.
4. W.D. Klopp, P.L. Raffo, and W.R. Witzke “Strengthening of Molybdenum and Tungsten Alloys with HfC,” Journal of Metals, 23(6) (1971), pp. 27–38.
5. Thaddeus B. Massalski, ASM Handbook 2nd addition Volume 3 Alloy Phase Diagrams (Metals Park, OH: ASM International, 1992), p. 3219.