Horgan, G. W., M. Talbot, and J. C. Davey. "Towards automatic recognition of plant varieties." In British Computer Society Electronic Workshops in Computing: The challenge of image retrieval. University of Northumbria at Newcastle, 5th February, 1998.
Harrington, R., S. Parker, M. Taylor, T. Adamowicz, D. Cox, S. Foster, I. Denholm, A. Dewar, and J. Pickup. "Trapped in 2002." British Sugar Beet Review 71 (2003): 12-17.
Carnegie, S. F., G. A. Hide, A. M. Cameron, P. Haddon, and S. M. Hall. "Tuber health of Scottish seed potatoes." In Abstracts of the 13th Triennial Conference of the European Association for Potato Research, 109-110. Veldhoven, 1996.
Scholten, M., W. Spoor, N. Green, G. Campbell, C. Southworth, N. Maxted, B. Ford-Lloyd, and M. Ambrose. "UK landraces and traditional varieties." In AAB Conference on Plant Genetic Resources for Food and Agriculture. Wellesbourne, Warwick, UK, 2008.