1. An adaptometer for measuring human dark adaption;Hecht;J. Opt. Soc. Am.,1938
2. Critz, G.T., and Mannen, R.E.: Effects of Increased Oxygen Tension on Dark Adaption. National Aviation Education Council-Air Crew Equipment Laboratory, No. 517, Feb. 1964.
3. Dark adaption. Some physical, physiological, clinical and aeromedical considerations;Sheard;J. Opt. Soc. Am.,1944
4. Retinal adaption in night flying;Cibis;J. Aviat. Med.,1952
5. Gravitational Stress in Aerospace Medicine;White,1961