1. [1] “Webster's New Collegiate Dictionary,” G. & C. Merriam Co., 1961.
2. [3] Harrington, R.L. (Editor), Marine Engineering, SNAME, 1971, New York.
3. “The Optimum Alignment of Marine Shafting,”;Bradshaw;Marine Technology,1974
4. [5] Bradshaw, R.T. and L. Vassilopoulos , “Optimum Shaft Alignment of Super Ocean Carriers,” Proceedings, Super Ocean Carrier Conference, New York, N.Y., January 1974.