1. ATC Systems Field Office. (1992). Traffic Management Advisor (TMA) Reference Manual. Moffett Field, CA: NASA-Ames Research Center.
2. Billings, C. E. (1992). Human-Centered Aircraft Automation: A Concept and Guidelines. NASA Technical Memorandum 103885. Moffett Field, CA: NASA-Ames Research Center.
3. Boff, K. R., and Lincoln, J. E. (Eds.). (1988). Engineering Data Compendium. Wright Patterson Air Force Base, OH: Harry G. Armstrong Aerospace Medical Research Laboratory.
4. Brooks, F. P., Jr. (1987). No silver bullet: Essence and accidents of software engineering. Computer, pp. 10–19.
5. Christensen, J. M. (1958). Trends in human factors. Human Factors, 1, 2–7.