Dirk Dujesiefken was a research fellow for the Chair for
Wood Biology from 1980 to 1991 and has been head of the Institute of
Arboriculture in Hamburg since 1991. He teaches at the University of Applied
Science (HAWK) in Göttingen, Germany, at the Swedish University of Agricultural
Science (SLU) in Alnarp, Sweden, and at the University of Natural Resources and
Life Sciences (BOKU) in Vienna, Austria.
Institute of Arboriculture, Hamburg, HH, Germany