2004 · J. Lodal, Mette Knorr, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2003 · J. Lodal, Mette Knorr, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2003 · J. Lodal, M. Knorr, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)