1. Kaspersky lab: 2013, http://media.kaspersky.com/en/business-security/Kaspersky_Global_IT_Security_Risks_Survey_report_Eng_final.pdf, 2013. Global Corporate IT Security Risks,
2. Symantec, 2014 Internet Security Threat Report, http://www.symantec.com/security_response/publications/threatreport.jsp, 2014.
3. iMPERVA, Assessing the Effectiveness of Antivirus Solutions,” http://www.imperva.com/docs/HII_Assessing_the_Effectiveness_of_Antivirus_Solutions.pdf, 2012.
4. A multifaceted approach to understanding the botnet phenomenon;Rajab,2006
5. Detecting click fraud in pay-per-click streams of online advertising networks;Zhang,2008