Cite error: Invalid <ref> tag; no text was provided for refs named forbes.com . 2018-03-01 http://www.financialexpress.com/economy/india-climbs-back-to-third-spot-in-billionaires-list/1084048/. Soo qaatay 2018-03-07.  Maqan ama ebar |title= (caawin) VnExpress. https://e.vnexpress.net/news/business/vietnam-s-billionaire-count-doubles-to-4-on-forbes-rich-list-3719366.html.  Maqan ama ebar |title= (caawin) https://www.forbes.com/billionaires/list/#country:Vietnam.  Maqan ama ebar |title= (caawin)