(1991)measuring root tunover using the minirhizotron technique
https://www.sciencedirect.com/science/article/abs/pii/016788099190113C
(2016) fine root turnover of japanese white birch (Betula platyphylla var. japonica) grown under elevated co2 in northern Japan
https://link.springer.com/content..
(2008) Partitioning soil surface CO2 efflux into autotrophic and heterotrophic components, using natural gradients in soil δ13C in an undisturbed savannah soil
https://agrilife.org/boutton/files/2013/01/PartitioningCO2fluxMillardetal2008_4.pdf
