1. Anon., 1979 : Granbarkbillen. Granbarkbille- og grantorkesituasjonen i Sor-Norge. NOU (Norges offentlige utredninger) , Landbruks departemented, Oslo, 71 pp. (in Norwegian).
2. After‐effects of drought did not predispose young Picea abies to infection by the bark beetle‐transmitted blue‐stain fungus Ophiostoma polonicum