Smith, M., Ollinger, S. V., Martin, M. E., Aber, J. D., Hallett, R. A., Goodale, C. L. (2002) Direct Estimation Of Aboveground Forest Productivity Through Hyperspectral Remote Sensing Of Canopy Nitrogen,
Ecological Applications, 12(5), 1286-1302. https://doi.org/10.2307/3099972
