Kiang, Nancy Y. "The Color of Plants on Other Worlds." Scientific American 298.4 (2008): 48-55.
Richardson, Andrew D., et al. "Tracking vegetation phenology across diverse North American biomes using PhenoCam imagery." Scientific data 5 (2018): 180028.
Knipling, Edward B. "Physical and physiological basis for the reflectance of visible and near-infrared radiation from vegetation." Remote sensing of environment 1.3 (1970): 155-159.
Woolley, Joseph T. "Reflectance and transmittance of light by leaves." Plant physiology 47.5 (1971): 656-662.