Li, R. S., Yang, Q. P., Zhang, W. D., Zheng, W. H., Chi, Y. G., Xu, M., ... & Wang, S. L. (2017). Thinning effect on photosynthesis depends on needle ages in a Chinese fir (Cunninghamia lanceolata) plantation.Science of the Total Environment,580, 900-906.
https://doi.org/10.1016/j.scitotenv.2..
Helm, J., Hartmann, H., Göbel, M., Hilman, B., Herrera, D., & Muhr, J. (2021). Low-cost chamber design for simultaneous CO2 and O2 flux measurements between tree stems and the atmosphere.Tree Physiology.
https://academic.oup.com/treephys/advance-article-abstract/doi/10.1093/treephys/tpab..
Tree_vitality_indicators_revealed_a_rapid_response.pdf