Bütler, RitaAngelstam, PerEkelund, PeterSchlaepfer, Rodolphe2006-10-232006-10-232006-10-23200410.1016/j.biocon.2003.11.014https://infoscience.epfl.ch/handle/20.500.14299/235240WOS:000222733600003Dead wood threshold values for the three-toed woodpecker presence in boreal and sub-alpine foresttext::journal::journal article::research article