2012 · Monika Messmer, Estelle Berset, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 3
2015 · Daniel Mühlrath, Jörg Schumacher, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2012 · Monika Messmer, Estelle Berset, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)