http://www.vodafone.com/content/dam/vodafone/investors/financial_results_feeds/preliminary_results_31march2017/dl_prelim2017.pdf
https://www.vodafone.com/content/annualreport/annual_report17/downloads/Vodafone-financial-statements-2017.pdf
http://telecom.economictimes.indiatimes.com/news/vodafone-group-serves-second-notice-on-india-to-formally-start-2nd-arbitration-in-tax-case/58697253
https://www.law360.com/articles/924460/vodafone-kicks-off-2nd-tax-arbitration-against-india
http://globalarbitrationreview.com/article/1146807/revealed-indias-three-attempts-to-halt-the-vodafone-case (requires subscription)
https://www.iareporter.com/articles/indian-supreme-court-allows-appointment-of-tribunal-president-in-vodafones-second-arbitration-against-india-but-restrains-arbitration-hearings-until-january/ (requires subscription)
https://www.iareporter.com/articles/an-update-on-investment-treaty-disputes-involving-the-government-of-india/ (requires subscription)
https://globalarbitrationreview.com/article/1169199/vodafone-goes-ahead-with-treaty-claim-against-india (requires subscription)
https://globalarbitrationreview.com/india-makes-billion-dollar-payout-end-tax-dispute (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)