D. A.  Walker, ?Vegetation and a LANDSAT-derived land cover map of the Beechey Point Quadrangle, Arctic Coastal Plain, Alaska?, COLORADO UNIV AT BOULDER INST OF ARCTIC AND ALPINE RESEARCH, 1987.

D. A.  Walker, ?Landsat-assisted environmental mapping in the Arctic National Wildlife Refuge, Alaska?, COLORADO UNIV AT BOULDER, 1982.

B. M.  Evans, Walker, D. A., Benson, C. S., Nordstrand, E. A., and Petersen, G. W., ?Spatial interrelationships between terrain, snow distribution and vegetation patterns at an arctic foothills site in Alaska?, Ecography, vol. 12, pp. 270-278, 1989.

N. A.  Auerbach, Walker, M. D., and Walker, D. A., ?Effects of roadside disturbance on substrate and vegetation properties in arctic tundra?, Ecological Applications, vol. 7, pp. 218-235, 1997.

D. A.  Walker, ?Hierarchical subdivision of Arctic tundra based on vegetation response to climate, parent material and topography?, Global Change Biology, vol. 6, pp. 19-34, 2000.

G. J.  Jia, Epstein, H. E., and Walker, D. A., ?Greening of arctic Alaska, 1981?2001?, Geophysical Research Letters, vol. 30, p. 2067, 2003.

D. A.  Walker, ?An integrated vegetation mapping approach for northern Alaska (1: 4 M scale)?, International Journal of Remote Sensing, vol. 20, pp. 2895-2920, 1999.

W. A.  Gould, Edlund, S., Zoltai, S., Raynolds, M., Walker, D. A., and Maier, H., ?Canadian Arctic vegetation mapping?, International Journal of Remote Sensing, vol. 23, pp. 4597-4609, 2002.

D. A.  Walker, Raynolds, M. K., Maier, H. A., Barbour, E. M., and Neufeld, G. P., ?Circumpolar geobotanical mapping: a web-based plant-to-planet approach for vegetation-change analysis in the Arctic?, Viten, vol. 1, pp. 125-128, 2010.

D. A.  Walker, ?An integrated vegetation mapping approach for the Circumpolar Arctic Vegetation Map?. p. 47, 1998.

D. A.  Walker, Gould, W. A., Maier, H. A., and Raynolds, M. K., ?The Circumpolar Arctic Vegetation Map: AVHRR-derived base maps, environmental controls, and integrated mapping procedures?, International Journal of Remote Sensing, vol. 23, pp. 4551-4570, 2002.

M. K.  Raynolds and Walker, D. A., ?Circumpolar relationships between permafrost characteristics, NDVI, and arctic vegetation types?. pp. 1469-1474, 2008.

M. K.  Raynolds, Walker, D. A., and Maier, H. A., ?Plant community-level mapping of arctic Alaska based on the Circumpolar Arctic Vegetation Map?, Phytocoenologia, vol. 35, pp. 821-848, 2005.

U. S.  Bhatt, Walker, D. A., Raynolds, M. K., Comiso, J. C., Epstein, H. E., Jia, G., Gens, R., Pinzon, J. E., Tucker, C. J., and Tweedie, C. E., ?Circumpolar Arctic tundra vegetation change is linked to sea-ice decline?, Earth Interactions, vol. 14, pp. 1-20, 2010.

M. K.  Raynolds and Walker, D. A., ?The effects of deglaciation on circumpolar distribution of arctic vegetation?, Canadian Journal of Remote Sensing, vol. 35, pp. 118-129, 2009.

G. J.  Jia, Epstein, H. E., and Walker, D. A., ?Spatial heterogeneity of tundra vegetation response to recent temperature changes?, Global Change Biology, vol. 12, pp. 42-55, 2006.

M. D.  Walker, Walker, D. A., and Auerbach, N. A., ?Plant communities of a tussock tundra landscape in the Brooks Range Foothills, Alaska?, Journal of Vegetation Science, vol. 5, pp. 843-866, 1994.

H. E.  Epstein, Walker, D. A., Raynolds, M. K., Jia, G. J., and Kelley, A. M., ?Phytomass patterns across a temperature gradient of the North American arctic tundra?, J. Geophys. Res, vol. 113, p. G03S02, 2008.

U.  Schickhoff, Walker, M. D., and Walker, D. A., ?Riparian willow communities on the Arctic Slope of Alaska and their environmental relationships: A classification and ordination analysis?, Phytocoenologia, vol. 32, pp. 145-204, 2002.

A.  Kade, Walker, D. A., and Raynolds, M. K., ?Plant communities and soils in cryoturbated tundra along a bioclimate gradient in the Low Arctic, Alaska?, Phytocoenologia, vol. 35, pp. 761-820, 2005.

M. D.  Walker, Walker, D. A., Everett, K. R., and Short, S. K., ?Steppe vegetation on south-facing slopes of pingos, Central Arctic Coastal Plain, Alaska, USA?, Arctic and Alpine Research, vol. 23, pp. 170-188, 1991.

M. K.  Raynolds, Comiso, J. C., Walker, D. A., and Verbyla, D., ?Relationship between satellite-derived land surface temperatures, arctic vegetation types, and NDVI?, Remote Sensing of Environment, vol. 112, pp. 1884-1894, 2008.

D. A.  Walker, Raynolds, M. K., Daniëls, F. J. A., Einarsson, E., Elvebakk, A., Gould, W. A., Katenin, A. E., Kholod, S. S., Markon, C. J., and Melnikov, E. S., ?The circumpolar Arctic vegetation map?, Journal of Vegetation Science, vol. 16, pp. 267-282, 2005.

D. A.  Walker, Bay, C., Daniels, F. J. A., Einarsson, E., Elvebakk, A., Johansen, B. E., Kapitsa, A., Kholod, S. S., Murray, D. F., Talbot, S. S., Yurtsev, B. A., and Zoltai, S. C., ?Toward a New Arctic Vegetation Map: A Review of Existing Maps?, Journal of Vegetation Science, vol. 6, pp. 427-436, 1995.