1. Austin, R. W. 1974. In: Ocean Color Analysis. SIO Ref. 74–10: 2. 1–2. 2.
2. Baker, K. S., R. C. Smith and A.E.S. Green. 1980. Middle ultraviolet radiation reaching the ocean surface Photochem. Photobiol. 32.: 367–374.
3. Baker, K. S. and R. C. Smith. Bio-Optical_.class.ification and model of natural waters II. Limnol. Oceanogr. (In press).
4. Caldwell, M. M. 1971. In Photophysiology. A.C. Giese, [ed.]Academic Press.
5. Hojerslev, N. K. 1980. On the origin of yellow sub-stance in the marine environment. Univ. Copenhagen Inst. Phys. Oceanogr. R Rep. 42.