Walker MD, Wahren CH, Hollister RD, Henry GH, Ahlquist LE, Alatalo JM, Bret-Harte MS, Calef MP, Callaghan TV, Carroll AB, Epstein HE, J?nsd?ttir IS, Klein JA, Magn?sson B, Molau U, Oberbauer SF, Rewa SP, Robinson CH, Shaver GR, Suding KN, Thompson CC, Tolvanen A, Totland ?, Turner PL, Tweedie CE, Webber PJ, Wookey PA. Plant community responses to experimental warming across the tundra biome. Proc Natl Acad Sci U S A. 2006 Jan 31; 103(5):1342-6.