1. Y. G. Kim and H. F. Merrick: NASA CR-159439, 1979.
2. T.E. Howson, D. A. Mervyn, and J. K. Tien:Metall. Trans. A, 1980, vol. 11A, pp. 1609–16.
3. Quarterly Progress Report No. 84, Materials for Advanced Turbine Engines Program, NASA Contract NAS3-20073 (Garren Turbine Engine Company), 1983.
4. H.F. Merrick, L.R. Curwick, and Y.G. Kim: NASA CR-135150, 1977.
5. T. K. Glasgow: unpublished research, NASA-Lewis Research Center, Cleveland, OH, 1983.