https://globalarbitrationreview.com/article/1209252/pca-hears-chevron%E2%80%99s-treaty-claim-against-philippines (requires subscription)
https://globalarbitrationreview.com/chevron-drops-treaty-claim-against-philippines (requires subscription)
https://www.iareporter.com/articles/arbitration-against-philippines-concludes-after-investor-sells-stake-in-offshore-gas-field/ (requires subscription)