Indigenous and introduced seed chalcids in Denmark - with a revised key to the Danish species (Hymenoptera: Torymidae).

Jensen, T. S., Ochsner, P., (1999). Entomologiske Meddelelser 67(2), 47-56. English language

Olfactory responses of seed wasps Megastigmus pinus parfitt and Megastigmus rafni Hoffmeyer (Hym., Torymidae) to host-tree odours and some monoterpenes.

Luik, A., Ochsner, P., Jensen, T. S., (1999). Journal of Applied Entomology 123(9), 561-567. English language

Phytophagous insect complex associated with cones of white fir, Abies concolor (Gord. and Glend.) Lindl., and its impact on seed production.

Shea, P. J., (1989). Canadian Entomologist 121(8), 699-708. English language

Interactions among phytophagous insect species colonizing cones of white fir (Abies concolor).

Shea, P. J., (1989). Oecologia 81(1), 104-110. English language

Megastigmus flies attacking conifer seeds.

Hussey, N. W., (1954). Forestry Commission Leaflet.(No. 8), 10 pp. English language