M. Gilichinsky, P. Sandström, H. Reese, S. Kivinen, J. Moen and M. Nilsson 2011: Mapping ground lichens using forest inventory and optical satellite data. - International Journal of Remote Sensing32(2): 455-472. [RLL List # 222 / Rec.# 32648] Abstract: [These researchers have developed a protocol for classiying optical satellite images of Sweden into ground lichen cover classes, which is useful information for understanding reindeer grazing patterns.]