1. Abrahamson W.G. Weis A.G. 1997. Evolutionary ecology across three trophic levels: goldenrods, gallmakers, and natural enemies. Princeton University, Princeton, NJ.
2. Variation in selection pressures on the goldenrod gall fly and the competitive interactions of its natural enemies
3. Ananthakrishan T.N. 1984. Adaptative strategies in ceci-dogenous insects, pp. 1–9 In . Ananthakrishan T.N. The biology of gall insects. Oxford and IBH, New Delhi, India.
4. Askew R.R. 1984. The biology ofgall wasps, pp. 223–271 In . Ananthakrishan T.N. The biology ofgall insects. Oxford and IBH, New Delhi, India.
5. Tritrophic Level Effects on Entomopathogenic Nematodes