Li, Y., Yang, H., Xia, J., Zhang, W., Wan, S., & Li, L. (2011). Effects of Increased Nitrogen Deposition and Precipitation on Seed and Seedling Production of Potentilla tanacetifolia in a Temperate Steppe Ecosystem. Public Library of Science.

Li, Yang, Haijun Yang, Jianyang Xia, Wenhao Zhang, Shiqiang Wan, and Linghao Li. Effects of Increased Nitrogen Deposition and Precipitation On Seed and Seedling Production of Potentilla Tanacetifolia in a Temperate Steppe Ecosystem. Public Library of Science, 2011.

Li, Yang, et al. Effects of Increased Nitrogen Deposition and Precipitation On Seed and Seedling Production of Potentilla Tanacetifolia in a Temperate Steppe Ecosystem. Public Library of Science, 2011.