1. Restmengder av lindan på bark av sprøytet grantømmer. (The effect of lindane sprayed timber on Ips typographus and Pityogenes chalcographus);Austarå;English summary. Norsk Skogbr.,1975
2. Aggregation pheromone in the bark beetle Ips duplicatus (Sahlberg);Bakke;Norw. J. Ent.,1975
3. Deploying pheromone-baited traps for monitoring Ips typographus populations;Bakke;Z. ang. Ent.,1985
4. Mass trapping of the spruce bark beetle Ips typographus. Pheromone and trap technology;Bakke;Medd. Nor. inst. skogforsk.,1983
5. Einige Gedanken über die Grundlagen des Einsatzes von Fallen zur Überwachung und Bekämpfung des Buchdruckers Ips typographus;Bombosch;Z. ang. Ent.,1983