AgX: a quick list:
Land, E. (1959) Color Vision and the Natural Image. Part I PNAS vol 45, pp 115-129
Land, E. (1959) Color Vision and the Natural Image. Part II PNAS vol 45, pp 636-644
Land, E. & McCann, J. (1971) Lighness and Retinex Theory JOSA vol 61(1), pp 1-11
McCann, J. Benton, J. & McKee, S. (2004) Red-white projections and rod/long-wave cone color: an annotated bibliography J Electr Imaging vol 31(1), pp 8-14
Brainard, D. & Wandell, B. (1986) Analysis of the retinex theory of color vision J Opt Soc Am A vol 3(10), pp 1651-1661 6Hurvich, L. & Jameson, D. (1955) Some quantitative aspects of an opponent-colors theory. II. J Opt Soc Am vol 45, pp 602+
For a more popular account there are the two Scientific American articles Land wrote about the Retinex experiements:
Edwin H. Land, "Experiments in Color Vision," Scientific American, Vol. 200, No. 5, pp. 84-99, May 1959.
Edwin H. Land, "The Retinex Theory of Color Vision," Scientific American, Vol. 237, No. 6, pp. 108-128, December 1977.
JOSA: Journal of the Optical Society of America
PNAS: Proceedings of the National Academy of Sciences (of the United States of America)