1. Digital Ad Spending to Surpass TV Next Year-eMarketerhttps://www.emarketer.com/Article/Digital-Ad-Spending-Surpass-TV-Next-Year/1013671
2. What Is an Untrustworthy Supply Chain Costing the US Digital Advertising Industry?http://www.iab.com/wp-content/uploads/2015/11/IAB_EY_Report.pdf
3. Should ad Networks Bother Fighting Click Fraud? (Yes, They Should);Mungamuru,2008
4. Automatic Detection of Online Recruitment Frauds: Characteristics, Methods, and a Public Dataset