<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/06/21/140621084336_stephanie_kwolek__624x351_ap_nocredit.jpg>
<http://www.bbc.com/indonesia/majalah/2014/06/140621_penemu_serat_ringan_wafat.shtml>