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@ARTICLE{,
    author = {Schegg, Roland and Venetz, Alwin},
     title = {Bewertungsportale - Gefahr oder Chance?},
   journal = {Businessmagazn f{\"{u}}r Gastronomie und Hotellerie, Edition 1/09,},
      year = {2009},
     pages = {p. 20.21}
}