2007: http://www.swisscancer.ch/fileadmin/swisscancer/praevention/files/ECToH07_Summary_Joossens_English.pdf
          http://old.ensp.org/files/30_european_countries_text_final.pdf
          http://old.ensp.org/files/tobacco_control_new_ranking_2007.pdf
          WHO: http://www.euro.who.int/document/e89842.pdf

2006 (including methods): http://tobaccocontrol.bmj.com/cgi/content/full/15/3/247
        http://www.aerzteinitiative.at/Joosens06EUrating.pdf

2005: http://old.ensp.org/files/effectivefinal2.pdf