Multi-decadal changes in tundra environments and ecosystems: the International Polar Year-Back to the Future Project (IPY-BTF).
Callaghan TV, Tweedie CE, Webber PJ. Multi-decadal changes in tundra environments and ecosystems: the International Polar Year-Back to the Future Project (IPY-BTF). Ambio. 2011 Sep; 40(6):555-7.