RE:RE:Freeport Prepared to Invest $5 Billion in Cukaru Peki Minehttps://serbia-energy.eu/serbia-mining-exclusive-freeport-mcmoran-to-invest-5bn-usd-in-new-copper-and-gold-mine-in-serbia/
https://siepa.gov.rs/en/index-en/about-siepa/publications/newsletter/newsletter,-may,-2014.html
Above are two (2) different links to two different articles/publications respecting the $18 billion valuation of Cukaru Peki by Freeport. Below is the link to the Freeport article about the deposit itself:
https://www.explorationinsights.com/MediaLib/Downloads/Home/Timok.pdf