The r elationship of photosynthesis to light intensity is examined, using phytoplankton cultured in different environments. The graphical means used in presenting the data are shown, and the desirability of normalizing the curves is discussed….
Yentsch, Charles S., and Robert W. Lee. 1966. "A study of photosynthetic light reactions, and a new interpretation of sun and shade phytoplankton." Journal of Marine Research 24, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1078