Stumm, C., Reinhard, I., Kemper, R. & T. Döring (2021): Nitrogen conservation with cover crops: Effect of CN ratio and N losses over winter on the potential to supply succeeding crops, IFOAM Organic World Congress, 6.-10. September 2021 in Rennes, France, https://orgprints.org/42231

Stumm, C. & U. Köpke (2017): Düngung mit Sprossmasse von Futterleguminosen: Lachgasemissionen und Nitratverluste. Beiträge zur 14. Wissenschaftstagung Ökologischer Landbau, 7.-10. März 2017 in Freising-Weihenstephan, 342-345, https://orgprints.org/31875

Stumm, C., Neuhoff, D. & U. Köpke (2014): Effect of storage temperature during tuber pre-sprouting on sprout and yield development of organically grown potatoes. 4th ISOFAR Scientific Conference, 13.-15. October 2014 in Istanbul, Turkey, 445-448, https://orgprints.org/23934

Kautz, T., Stumm, C., Kösters, R. & U. Köpke (2010): Effects of perennial fodder crops on soil structure in agricultural headlands. Journal of Plant Nutrition and Soil Science 173, 490-501 http://onlinelibrary.wiley.com/doi/10.1002/jpln.200900216/pdf

Stumm, C. & U. Köpke (2008): Organic Pilot Farms in North Rhine-Westphalia (Germany). 2nd Scientific Conference of ISOFAR, 18th-20th June 2008 in Modena, Italy, https://orgprints.org/12594