NASA - National Aeronautics and Space Administration

Ganguly, S., R. Nemani, F. Baret, J. Bi, M. Weiss, G. Zhang, C. Milesi, H. Hashimoto, A. Samanta, A. Verger, K. Singh, and R. Myneni (2014), Green Leaf Area and Fraction of Photosynthetically Active Radiation Absorbed by Vegetation, Biophysical Applications Satellite Remote Sensing. Berlin/Heidelberg: Springer Verlag, 43-61, doi:10.1007/978-3-642-25047-7_2.