http://globalarbitrationreview.com/article/1067559/panels-in-place-for-indian-back-tax-disputes (requires subscription)
https://www.cairnindia.com/sites/default/files/press_releases/2015-03-27_RNS_VED%20_BIT-Claim.pdf
http://www.thehindubusinessline.com/companies/tax-row-vedanta-names-james-spigelman-to-represent-its-case/article8988413.ece
https://www.iareporter.com/articles/quasi-consolidation-of-billion-dollar-retroactive-tax-cases-is-nixed-arbitrators-also-rule-that-cairn-v-india-case-should-not-be-stayed-in-deference-to-vedanta-proceeding/ (requires subscription)
https://www.iareporter.com/articles/indias-retroactive-taxation-disputes-seemingly-draw-to-a-close-as-vedanta-requests-discontinuance-of-its-treaty-based-arbitration-while-vodafone-also-eyes-settlement/ (requires subscription)
https://globalarbitrationreview.com/india-makes-billion-dollar-payout-end-tax-dispute (requires subscription)