.Moneysavingexpert.com
http://www.moneysavingexpert.com/team-blog/2012/03/06/kindle-vs-kobo-battle-of-the-e-readers/
Aceitaumlete.com:
http://www.aceitaumleite.com/2012/12/kindle-x-kobo-qual-e-reader-e-melhor.html
ZDnet:
http://www.zdnet.com/amazon-kindle-or-whsmith-kobo-ereader-touch-4010024630/
Techcrunch:
http://e-readers.techcrunch.com/compare/79-84/Amazon-Kindle-Paperwhite-vs-Kobo-Glo
