2005 · Florian Rau, Ulrike Weier, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 2
2006 · Florian Rau, Ulrike Weier, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2005 · Ulrike Weier, Florian Rau · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2004 · U. Weier, Uwe Hornischer · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)