@article {ARC22105,
	title = {Interactions among shrub cover and the soil microclimate may determine future Arctic carbon budgets},
	journal = {Ecology Letters},
	volume = {15},
	year = {2012},
	pages = {1415-1422},
	keywords = {shrub encroachment},
	isbn = {1461-0248},
	doi = {10.1111/j.1461-0248.2012.01865.x},
	url = {http://dx.doi.org/10.1111/j.1461-0248.2012.01865.x},
	author = {S. M. P. Cahoon and P. F. Sullivan and Gaius R Shaver and J. M. Welker and E. Post}
}
@article {ARC22819,
	title = {Climate and species affect fine root production with long-term fertilization in acidic tussock tundra near Toolik Lake, Alaska},
	journal = {Oecologia},
	volume = {153},
	year = {2007},
	pages = {643-652},
	doi = {10.1007/s00442-007-0753-8},
	author = {P. F. Sullivan and M. Sommerkorn and H. M. Rueth and K. J. Nadelhoffer and Gaius R Shaver and J. M. Welker}
}
