March 2010 article by American Snowmobiler http://www.amsnow.com/How%20To%20and%20Tech/2010/03/Future%20Tech.aspx Cool News by American Snowmobiler http://cs.amsnow.com/snocs/blogs/news/archive/2010/05/19/rad-technology-receives-popular-science-s-invention-award.aspx Canadian offers RAD Suspension written by Olav Aaen http://www.amsnow.com/News/Cool%20News%20Archive/2009/01/Canadian%20offers%20RAD%20suspension.aspx