@misc {ahlers07montaphone,
   address = {Münster, Germany},
   author = {Dirk Ahlers and Susanne Boll and Daniel Wichmann},
   month = {sep},
   title = {Location-based Mobile Hiking Narratives},
   type = {Poster},
   url = {http://www.gi-tage.de/},
   year = {2007},
   note = {GI-Days 2007},
   howpublished = {Poster at GI-Days 2007}
}