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Vegetation canopy PAR absorptance and the normalized difference vegetation index: An assessment using the SAIL model Samuel N. Goward , K. F. Huemmrich 1992 Remote Sensing of Environment 447 citations
Global discrimination of land cover types from metrics derived from AVHRR pathfinder data Ruth DeFries , Matthew C. Hansen , John Townshend 1995 Remote Sensing of Environment 339 citations