1. Wan, Xiaohua, et al. "Soil C: N ratio is the major determinant of soil microbial community structure in subtropical coniferous and broadleaf forest plantations." Plant and soil 387.1-2 (2015): 103-116.
https://doi.org/10.1007/s11104-014-2277-4

2. Finér, Leena, et al. "Conifer proportion explains fine root biomass more than tree species diversity and site factors in major European forest types." Forest Ecology and Management 406 (2017): 330-350.
https://doi.org/10.1016/j.foreco.2017.09.017

3. Silver, Whendee L., and Ryan K. Miya. "Global patterns in root decomposition: comparisons of climate and litter quality effects." Oecologia 129.3 (2001): 407-419.
https://doi.org/10.1007/s004420100740