• Confessions of a Google Spammer https://readthink.com/confessions-of-a-google-spammer-4f2e0c3e9869#.yskwscj4t 2 comments 19/11/2016
• Confessions of a Google Spammer (2015) https://inbound.org/blog/confessions-of-a-google-spammer 25 comments 20/2/2016