1. 1) A. C. Zettlemoyer and J. H. Taylor, Off. Dig., 32,648 (1960)
2. 2) T. C. Patton, Off. Dig., 35, 1328 (1963)
3. 3) O. Reynolds, Trans. Roy. Soc., London, 177,157 (1886)
4. 4) E. K. Gatcombe, Trans. Am. Soc. Mech., 67,177 (1945)
5. 5) R. E. Gaskell, J. Appl. Mech., 17,334 (1950)