1. Abdulla, I., 1978. Studies on host discrimination, mating and sex determination in Apanteles glomeratus (L.) and Pteromalus puparum (L.); hymenopterous parasitoids of Pieris species. Ph.D. thesis, University of London (Wye College) Unpublished.
2. Andriescu, I., 1973. Importance economique des chalcids en Roumanie. Ecol. Ter. Gen. 1972–1973: 155–190.
3. Askew, R.R., 1971. Parasitic Insects. Heinemann Educational Books. London. pp. 316.
4. Berkoviten, I., 1972. Seeking pest solutions at Silwood Park. Int. Pest Control 14: 24–25.
5. Bignell, G.C., 1883. Extra-ordinary number of Apanteles glomeratus infesting Pieris brassicae. Entomologist 16: 263.