Klomp, H. und Teerink, B. J. (1973) „The density of the invertebrate summer fauna on the crowns of pine trees, Pinus sylvestris in the central part of the Netherlands.“, Beiträge zur Entomologie = Contributions to Entomology, 23(5-8), S. 325-340. doi: 10.21248/contrib.entomol.23.5-8.325-340.