Mayer,  S., Kühnel, A., Burmeister, J., Kögel-Knabner, I., Wiesmeier, M. (2019): Controlling factors of organic carbon stocks in agricultural topsoils and subsoils of Bavaria. Soil and Tillage Research, 192, 22-32. doi.org/10.1016/j.still.2019.04.021.

https://www.sciencedirect.com/science/article/pii/S0167198719301187