Source: Flatstyle URL of the article: http://www.flatstylebmx.com/2012/02/michael-sommer-one-dude-one-day.html
a film by michael sommer and thomas zronekmusic: amtrakvote now! http://www.sport2.de/rivella/teilnehmer/view/artikel/bmx-video-by-thomas-zronek.html
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