- Hayes, A. J., and D. R. Parihar. 1987. Some observations on the breeding biology of Scolytus scolytus (Coleoptera: Scolytidae), a vector of Dutch elm disease in Scotland . Arboricultural Journal 11:333-344.
- Parihar, D. R., and A. J. Hayes. 1987. Biology of Scolytus laevis Chapuis (Coleoptera: Scolytidae), a vector of Dutch elm disease in Scotland . Scottish Forestry 41:185-196.