1. Bhattacharyya , A. 1957 A study in insect parasitism - the parasites of Oscinella frit with an account of their biology and interrelations Ph.D. Thesis University of London
2. Clements , R. O. 1979 Factors affecting the incidence of stem boring Diptera in agricultural grassland and their effects on herbage yield Ph.D. Thesis University of Reading
3. Clements , R. O. B. R. Bentley D. Moore A. M. Spaull The impact of a range of pesticide treatments on newly-sown Italian ryegrass ( Lohum multiflorum ) and the identity of the major pest species Crop Protection
4. Clements , R. O. I. F. Henderson 1983 Improvement of yield and persistence of Italian ryegrass through pest control