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.
Stevens, M, and C. Lacomme. "Transmission of Plant Viruses." In Aphids as Crop Pests, pp323-361. 2nd ed. Wallingford, Oxfordshire, UK ; Boston, MA: CABI, 2017.
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.