D. A.  Stow, Hope, A., McGuire, D., Verbyla, D., Gamon, J., Huemmrich, F., Houston, S., Racine, C., Sturm, M., and Tape, K., ?Remote sensing of vegetation and land-cover change in Arctic tundra ecosystems?, Remote Sensing of Environment, vol. 89, pp. 281-308, 2004.