1. eMarketer:It is estimated that global retail e-commerce sales will reach 3.563 trillion US dollars in 2019 [Online]. Available:http://www.199it.com/archives/856125.html. eMarketer:It is estimated that global retail e-commerce sales will reach 3.563 trillion US dollars in 2019 [Online]. Available:http://www.199it.com/archives/856125.html.
2. Fake It Till You Make It: Reputation, Competition, and Yelp Review Fraud;Luca M.;SSRN Electronic Journal,2013