1. I.G. Polotzki, T.Y. Benieva, and Z.L. Khodor, Effect of Supersonic Vibrations on the Crystallization Processes, Akad. Nauk, Vol 6, 1953

2. A.E. Bibb and S.M. Bishop, "Grain Refinement of Cast Beryllium," KAPL-1917, General Electric Co., 1950

3. S.H. Gelles and R.K. Malik, "Process Development for Producing Fine-Grain Casting in Space," Report CR-120739, National Aeronautics and Space Administration, April 1975

James M. Marder, Brush Wellman

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