1. Nitrogen cycling and nitrogen saturation in temperate forest ecosystems;Aber;Trends Ecol. Syst.,1992
2. Hindcasting nitrogen deposition to determine an ecological critical load;Baron;Ecol. Appl.,2006
3. Deposition of reactive nitrogen during the Rocky Mountain Airborne Nitrogen and Sulfur (RoMANS) study;Beem;Environ. Pollut.,2010
4. Bowman, W.D., Baron, J.S., Geiser L.H., Fenn, M.E., Lilleskov, E.A., 2011. Ch 8. Northwestern forested mountains. From: Assessment of nitrogen deposition effects and empirical critical loads of nitrogen for ecoregions of the United States. Gen. Tech. Rep. NRS-80. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 291 pp. (Ch 8—Northwestern Forested Mountains, 75–88).
5. An ordination of the upland forest communities of southern Wisconsin;Bray;Ecol. Monogr.,1957