2002 · Birgitta Rämert, Margi Lennartsson, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 37
2000 · Francis Rayns, L. F. Jackson, et al. · IFOAM 2000: the world grows organic. Proceedings 13th International IFOAM Scientific Conference, Basel, Switzerland, 28 to 31 August, 2000. · 5
2000 · Bruce Pearce, C. Stopes, et al. · IFOAM 2000: the world grows organic. Proceedings 13th International IFOAM Scientific Conference, Basel, Switzerland, 28 to 31 August, 2000. · 1
1999 · Chris Firth, Margi Lennartsson · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
2008 · Phil Sumption, Margi Lennartsson · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2000 · Margi Lennartsson, R. Manchett, et al. · IFOAM 2000: the world grows organic. Proceedings 13th International IFOAM Scientific Conference, Basel, Switzerland, 28 to 31 August, 2000.