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WikiPedia: Visa_Inc. http://www.bizjournals.com/sanfrancisco/news/2012/... http://www.nasdaq.com/symbol/v/financials?query=in... http://www.networkcomputing.com/networking/inside-... http://usatoday30.usatoday.com/tech/news/story/201... http://visa.com http://www.corporate.visa.com http://usa.visa.com/download/corporate/_media/visa... http://www.visa.com https://www.finextra.com/pressarticle/65412/unionp... https://www.forbes.com/sites/danielfisher/2015/05/...