A view ahead for the bicycle industry by Mark Sanders 
http://issuu.com/mark77a/docs/upright_is_right-the_view_ahead/1
Alexander Technique to cycling
http://www.guardian.co.uk/lifeandstyle/2008/sep/18/fitness.cycling
Here are the feedbacks from other cyclists. 
http://www.bikeforums.net/showthread.php?683938-Cycling-Posture-Upright-is-Right!
http://www.ecovelo.info/2010/09/13/whats-your-position-on-position/