1. Bates, B., Conway, J. K., and McKeith, C. D.: 1973, J. Phys. E. Sci. Instr. 6, 739.
2. Bates, B., McKeith, C. D., Courts, G. R., and Conway, J. K.: 1974, Space Optics, National Academy of Sciences, p. 319.
3. Bolle, H. J., Bottema, M., Volker, W., and Zickler, A.: 1971, Infrared Detection Techniques for Space Research, p. 289.
4. Bousquet, P.: 1971, Spectroscopy and its Instrumentation, Hilger, London.
5. Caplan, J.: 1972, Appl. Opt. 11, 1978.