https://slavyanski.net/sb2020/story.php?title=what-every-person-should-know-about-xxx-sexs Athey, S. Nekipelov, D. (January 2012). "A Structural Model of Sponsored Search Advertising Auctions" (PDF). Demers, Jason (2 January 2013). "5 Deadly Sins of Seo and Online Marketing". Morrissey, Brian (12 April 2013). "How the Banner Ad Was Born". Briggs, Rex Hollis, Nigel (April 1997). Advertising on the Web: Is there Response Before Clickthrough?. Brandom, Russell (April 11, 2018). Sun, 25 Sep 2022 19:00:40 UTC en