Foreign Policy
Daniel Yergin:
http://www.foreignpolicy.com/articles/2014/09/11/exploding_world_cheap_oil_crude_prices_geopolitics_isis_opec?wp_login_redirect=0
http://www.foreignpolicy.com/articles/2014/09/11/exploding_world_cheap_oil_crude_prices_geopolitics_isis_opec?wp_login_redirect=0