Gall midges (Diptera: Cecidomyiidae) of Denmark.

Skuhravá, M., Skuhravý, V., Jøgensen, J., (2006). Entomologiske Meddelelser 74(Special Issue), 1-94. Entomologisk Forening i København, Copenhagen, Denmark. Danish 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