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Ffrench-Constant, R. H., Devonshire, A. L. and Clark, S. J. 1987. Differential rate of selection for resistance by carbamate, organophosphorus and combined pyrethroid and organophosphorus insecticides in Myzus persicae (Sulzer) (Hemiptera: Aphididae). Bulletin of Entomological Research. 77 (2), pp. 227-238. https://doi.org/10.1017/S0007485300011706
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Johnson, C. G., Walsh, J. F., Davies, J. B., Clark, S. J. and Perry, J. N. 1985. The pattern and speed of displacement of females of simulium-damnosum theobald si (diptera, simuliidae) across the onchocerciasis control program area of west-africa in 1977 and 1978. Bulletin of Entomological Research. 75 (1), pp. 73-92. https://doi.org/10.1017/s0007485300014188
Brobyn, P. J., Wilding, N. and Clark, S. J. 1985. The persistence of infectivity of conidia of the aphid pathogen Erynia neophidis on leaves in the field. Annals of Applied Biology. 107 (3), pp. 365-376. https://doi.org/10.1111/j.1744-7348.1985.tb03153.x
Perry, J. N. and Clark, S. J. 1983. Use of population-models to estimate the proportion of cyst-nematode eggs killed by fumigation. Journal of Applied Ecology. 20 (3), pp. 857-864. https://doi.org/10.2307/2403130