Schull, M.A., Knyazikhin, Y., Xu, L., Samanta, A., Carmona, P.L., Lepine, L., Jenkins, J.P., Ganguly, S., & Myneni, R.B. (2011). Canopy spectral invariants, Part 2: Application to classification of forest types from hyperspectral data. Journal of Quantitative Spectroscopy and Radiative Transfer, 112, 736-750.