Larsson, Kjell, and Lars Tydén. 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 15 (3). Lund, Sweden:161-71. https://doi.org/10.34080/os.v15.22740.