Larsson, K. and Tydén, L. (2005) “Effects of oil spills on wintering Long-tailed Ducks Clangula hyemalis at Hoburgs bank in central Baltic Sea between 1996/97 and 2003/04”, Ornis Svecica. Lund, Sweden, 15(3), pp. 161–171. doi: 10.34080/os.v15.22740.