• BBC News - Russia signs 30-year gas deal with China http://m.bbc.co.uk/news/business-27503017 6 comments 21/5/2014 worldnews
• BBC News - Russia signs 30-year gas deal with China (estimated value of $500 billion) http://www.bbc.co.uk/news/business-27503017 5 comments 21/5/2014 worldnews