The leaders also discussed some international issues MOSCOW, November 24. /TASS/. Russian President Vladimir Putin and Turkish President Recep Tayyip Erdogan spoke by phone and discussed ways to improve efficiency of bilateral trade and economic cooperation, the Kremlin said in a statement. "Following up on the conversation in Kazan on October 23, they substantively discussed pressing issues of the bilateral agenda with a focus on improving the effectiveness of trade and economic cooperation.