South Korea expresses concern over China's plan to monitor the disputed Socotra Rock area with unmanned drones. [http:--english.yonhapnews.co.kr-national-2012-09-25-92-0301000000AEN20120925008400315F.HTML (Yonhap)] [http:--mainichi.jp-english-english-newsselect-news-20120925p2g00m0in069000c.html (Kyodo News via "Mainichi Shimbun")]date=August 2019