<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2011/09/01/110901053915_vietnam_china_304x171_qdnd_nocredit.jpg>
<http://bbcvietnamese.com/vietnamese/world/2013/05/130530_shangrila_2013_preview.shtml>