Ma, C., Y. Li, H. You, H. Long, W. Yu, Y. Gao, and Y. Wang. “Nonstructural Carbohydrates, Carbon and Nitrogen Concentrations in Fine Roots of Quercus Variabilis Secondary Forests After Two Different Periods of Regeneration”. Forest Systems, Vol. 30, no. 1, Apr. 2021, p. e001, doi:10.5424/fs/2021301-16550.