Zhang, H, Y. Lan, R. Lacey, W. C. Hoffmann, and Y. Huang. 2009. “Analysis of Vegetation Indices Derived from Aerial Multispectral and Ground Hyperspectral Data”. International Journal of Agricultural and Biological Engineering 2 (3). Beijing, China:33-40. https://ijabe.org/index.php/ijabe/article/view/171.