2014 · Sonya Ivanova-Peneva · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2011 · Alexander Beck, Jacques Cabaret, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2011 · Alexander Beck, Jacques Cabaret, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2008 · Sonya Ivanova-Peneva, A.J.A. Aarnink, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2006 · Sonya G. Ivanova-Peneva, R. Nedeva, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2005 · Sonya Ivanova-Peneva, A.J.A. Aarnink, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)
2005 · A.J.A. Aarnink, S.G. Ivanova-Peneva, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture)