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https://www.hindawi.com/journals/scn/2018/7178164/


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http://www.antiy.net/p/2017-global-botnet-ddos-attack-threat-report


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https://www.insight.com/content/dam/insight-web/en_US/article-images/whitepapers/partner-whitepapers/Internet%20Security%20Threat%20Report.pdf


4¡¢Tango down report of OP China ELF DDoS'er
http://blog.malwaremustdie.org/2014/09/tango-down-report-of-op-china-elf-ddoser.html