1. M. A. Schultz, “Control of Nuclear Reactors and Power Plants”, McGraw Hill, New York (1961)
2. M. Sackman, “Computers, System Science and Evolving Society”, John Wiley and Sons, New York (1967), p. 122
3. W. T. Singleton, (ed.), “The Human Operator in Complex Systems”, Taylor and Francis Ltd., London (1971)
4. E. Edwards and F. P. Lees, “The Human Operator in Process Control”, The Institution of Chemical Engineers, London (1972)
5. E. Edwards and F. P. Lees, “The Human Operator in Process Control”, Taylor and Francis Ltd., London (1974)