Bahn, M., Schmitt, M., Siegwolf, R., Richter, A., & Brüggemann, N. (2009). Does photosynthesis affect grassland soil-respired CO2 and its carbon isotope composition on a diurnal timescale? New Phytologist, 182(2), 451-460. https://doi.org/10.1111/j.1469-8137.2008.02755.x