The Serbian central bank intervened on the inter-bank market on Thursday, buying an unspecified quantity of euros to stem gains of the dinar which remained strong despite a 30 million euros ($35.68 million) purchase a day earlier, dealers said. The bank which so far in 2017 purchased 990 million euros, stepped in as the dinar traded at around 118.88 to the euro, slightly stronger than the previous close of 118.9.