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“I'm here to help” : How companies' microblog responses to consumer problems influence brand perceptions
Coyle, James R., (2012)
"Click here to share with a friend" : a uses and gratifications approach to word-of-mouth marketing ettectiveness
Coyle, James R., (2011)
Reconsidering Models of Influence: The Relationship between Consumer Social Networks and Word-of-Mouth Effectiveness
Smith, Ted, (2007)