@article{Wang2004,
author = {Wang, J. and Rich, P.M. and Price, K.P. and Kettle, W.D.},
title= {Relations between NDVI and tree productivity in the central Great Plains},
year = {2004},
doi = {10.1080/0143116032000160499},
journal = {International Journal of Remote Sensing},
volume = {25},
number = {16},
pages = {3127--3138},
}