http://globalarbitrationreview.com/article/1067235/shell-takes-on-philippines-over-back-taxes (requires subscription)
http://www.iareporter.com/articles/shell-files-investment-treaty-claim-against-the-philippines/ (requires subscription)
http://uk.reuters.com/article/uk-philippines-shell-court-idUKKBN0U117020151218
https://www.doe.gov.ph/press-releases/doe-nationalistic-approach-needed-dealing-shell-and-other-business-partners
http://www.philstar.com/business/2016/07/24/1605878/shell-files-tax-case-international-arbitration
https://www.iareporter.com/articles/veeder-chosen-to-chair-tax-dispute-between-shell-led-consortium-and-the-philippines/ (requires subscription)