2008 · S. Keil, Marianne Benker, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 2
2007 · Michael Zellner, Sven Keil, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
2006 · Marianne Benker, Michael Zellner · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
2006 · Marianne Benker, Michael Zellner, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
2011 · Michael Zellner, J. Hofbauer, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2008 · Michael Zellner, Sven Keil, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2006 · Lars-Wilhelm Bangemann, S. Wohlleben, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)