Fang, Y., Xun, F., Bai, W., Zhang, W., & Li, L. (2012). Long-Term Nitrogen Addition Leads to Loss of Species Richness Due to Litter Accumulation and Soil Acidification in a Temperate Steppe. Public Library of Science.

Fang, Ying, Fen Xun, Wenming Bai, Wenhao Zhang, und Linghao Li. Long-Term Nitrogen Addition Leads to Loss of Species Richness Due to Litter Accumulation and Soil Acidification in a Temperate Steppe. Public Library of Science, 2012.

Fang, Ying, et al. Long-Term Nitrogen Addition Leads to Loss of Species Richness Due to Litter Accumulation and Soil Acidification in a Temperate Steppe. Public Library of Science, 2012.