@article{StuckasStoofQuesadaetal.2009,
  author    = {Heiko Stuckas and Kathleen Stoof and Humberto Quesada and Ralph Tiedemann},
  title     = {Evolutionary implications of discordant clines across the Baltic Mytilus hybrid zone (Mytilus edulis and Mytilus trossulus)},
  doi       = {10.1038/Hdy.2009.37},
  url       = {http://www.nature.com/hdy/archive/index.html},
  year      = {2009},
}