Plantae
Tieszen, L. L., M. C. Lewis, P C. Miller J. Mayo, F S. Chapin III, and W C. Oechel, 1981: Tundra ecosystems: A comparative analysis. The International Biological Programme, edited by L. C. Bliss, 0. W. Heal, and J. J. Moore, Vol. 25, Cambridge Univ. Press, New York, 285—356.