1. Rideout, S. P., Manly, W. D., Kamen, E. L., Lement, B. S., and Beck, P. A., Trans. Amer. Inst. Mech. Eng., 191, 872 (1951).
2. Komura, Y., Sly, W. G., and Shoemaker, D. P., Acta Cryst., 13, 575 (1960).
3. Das, B. N., and Beck, P. A., Trans. Amer. Inst. Mech. Eng., 218, 733 (1960).
4. Waterstrat, R. M., Trans. Amer. Inst. Mech. Eng., 221, 687 (1961).
5. Gupta, K. P., Rajan, N. S., and Beck, P. A., Trans. Amer. Inst. Mech. Eng., 218, 617 (1960).