Bunkin, F.V., A.B. Druzhko, B.I. Mitsner, A.M. Prokhorov, V.V. Savranskii, T.B. Shevchenko, N.W. Tkachenko, and N.N. Vsevolodov. 1981. Diffraction efficiency of bacteriorhodopsin and its analogs. Soviet Technical Physics Letters 7:630-631.
NRC (National Research Council). 2001. Opportunities in Biotechnology for Future Army Applications. National Academy Press, Washington, D.C.
U.S. Congress, OTA (Office of Technology Assessment). 1993. Who Goes There: Friend or Foe? OTA-ISC-537. U.S. Government Printing Office, Washington, D.C. Available online at http://govinfo.library.unt.edu/ota/Ota_1/DATA/1993/9351.PDF. Last accessed on February 9, 2005.
Vsevolodov, N.N., and V.A. Poltoratskii. 1985. Holograms in biochrome, a biological photochromic material. Soviet Physics Technical Letters 30:1235.