NASA - National Aeronautics and Space Administration

Kasischke, E., L. A. Morrissey, J. Way, N. H. F. French, L. L. Bourgeau-Chavez, E. Rignot, J. A. Stearn, and G. P. Livingston (1995), Monitoring Seasonal Variations in Boreal Ecosystems Using Multi-Temporal Spaceborne SAR Data, Canadian Journal of Remote Sensing, 21, 96-109.