2013 · Alfred Berner, Herwart Böhm, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 2
2009 · Otto Schmid, Nikola Patzel, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
2019 · Birgit Wilhelm, Nikola Patzel · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2018 · Alfred Berner, Hansueli Dierauer, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)