Langstrom B, Hellqvist L, Cedervind J 2004 Comparison of methods for estimation of needle losses in Scots pine following defoliation by Bupalus piniaria Research article (Peer reviewed) DOI:10.14214/sf.432
Långström, Bo; Lieutier, F; Day, K R et. al 2004 General conclusions and research priorities for BAWBILT organisms in Europe Book chapter
Långström, Bo; Day, K R 2004 Damage, control and management of weevil pests, especially Hylobius abietis Book chapter
Cedervind J, Langstrom B 2003 Tree mortality, foliage recovery and top-kill in stands of Scots pine (Pinus sylvestris) subsequent to defoliation by the pine looper (Bupalus piniaria) Research article (Peer reviewed) DOI:10.1080/02827580310018569