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http://news.bbc.co.uk/1/hi/business/6298641.stm
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http://www.v3.co.uk/v3-uk/news/2355596/botnets-infecting-18-systems-per-second-warns-fbi
4. Android smartphones ‘used for botnet’, researchers say, July 5 2012.
http://www.bbc.co.uk/news/technology-18720565
5. Vincent, J.: Could your fridge send you spam? Security researchers report ’internet of things’ botnet. The Independent, Jan. 20 2014.
http://www.independent.co.uk/life-style/gadgets-and-tech/news/could-your-fridge-send-you-spam-security-researchers-report-internet-of-things-botnet-9072033.html