2008 · M. Trapman, Pieter Jans Jansonius · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 9
2005 · B. Heijne, P.F. de Jong, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 2
2008 · Pieter Jans Jansonius · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2004 · Pieter Jans Jansonius · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2002 · Joke Bloksma, Pieter Jans Jansonius · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2000 · Joke Bloksma, Pieter Jans Jansonius · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)