By J. Turok, G Eriksson, J. Kleinschmit, S. Canger, International Plant Genetic Resources Institute
By T. Gass, K.R. Tobutt, A. Zanetto, International Plant Genetic Resources Institute
By Erica E. Benson, International Plant Genetic Resources Institute
By N.R. Sackville-Hamilton, J.M.M. Engels, T.J.L. van Hintum, B. Koo, M.A. Smale
By International Plant Genetic Resources Institute