1. Vegetation zones and their sections in northwestern Europe;Ahti;Annales Botanici Fennici,1968
2. Virkningen av skogbrann på bille faunaen. Influence of forest fire on the beetle fauna;Bakke;Rapport Fra Skogsforsk,1996
3. Studies on Hylobius abietis L.I. Development and life cycle in the Nordic countries;Bejer-Petersen;Acta Entomologica Fennica,1962
4. Host-plant acceptance on mineral soil and humus by the pine weevil Hylobius abietis (L.);Björklund;Agricultural and Forest Entomology,2003
5. Forest types and their significance;Cajander;Acta Forestalia Fennica,1949