References
- Alexandrova [Aleksandrova], V. D., 1970: The vegetation of tundra zones in the USSR and data about its productivity. In Fuller, W. A. and Kevan, P. G. (eds.), Productivity and Conservation in Northern Circumpolar Lands. Int. Union Conserv. Natur., Morges, Switzerland, Publ. N.S. 16, 93–114.
- Aleksandrova, V. D., 1971: Printsipy zonal'nogo deleniya rastitel'nosti Arktiki (The principles of zonal subdivision of arctic vegetation). Bot. Zh., 56:3–21.
- Young, S. B., 1971: The vascular flora of St. Lawrence Island with special reference to floristic zonation in the arctic regions. Contrib. Gray Herb., 201: 11–115.