http://bit-coin.livejournal.com/
http://ru.wikipedia.org/wiki/Bitcoin#.D0.9A.D1.80.D0.B8.D1.82.D0.B8.D0.BA.D0.B0
http://www.guardian.co.uk/technology/video/2013/mar/22/bitcoin-currency-video
http://habrahabr.ru/post/122755/
http://www.huffingtonpost.com/2013/04/16/gavin-andresen-bitcoin_n_3093316.html
