http://www.rsis.edu.sg/rsis-publication/rsis/co18082asean-and-soft-balancing-south-china-sea-as-zone-of-peace/#.WwaEvy9L28U
https://www.nst.com.my/opinion/columnists/2018/05/371792/time-declare-south-china-sea-zone-peace
https://www.straitstimes.com/opinion/asean-and-soft-balancing-time-to-declare-s-china-sea-a-zone-of-peace
