?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=K%C3%A4rin&rft.aulast=Nickelsen&rft.au=Nickelsen%2C+K%C3%A4rin&rft.date=2009&rft.inst=Phil.-nat.+Fakult%C3%A4t+der+Universit%C3%A4t+Bern&rft.degree=Habilitationsschrift&rft.tpages=430&rft.title=Of+Light+and+DarknessEnglisch