@article{KnollSchramm2015,
  author    = {Johannes Knoll and Holger Schramm},
  title     = {Advertising in social network sites - Investigating the social influence of user-generated content on online advertising effects},
  journal   = {Communications},
  volume    = {40},
  number    = {3},
  doi       = {10.1515/commun-2015-0011},
  year      = {2015},
}