Cockerell, V., and W. J. Rennie. "Strategies for cereal seed health." In Scottish Agricultural Science Agency Scientific Review 1992-1997, 8-10. Edinburgh: Scottish Agricultural Science Agency, 1998.
Rennie, W. J., and V. Cockerell. "Strategies for cereal seed treatment." In Seed Treatment: Progress and Prospects, 17-126. BCPC Monograph Series ; No. 57. Bracknell: British Crop Protection Council, 1994.
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.