December 29 (SeeNews) - The main share indices of the Zagreb Stock Exchange (ZSE) rose on Wednesday Tuesday, backed by gains in hotel operator Valamar Riviera [ZSE:RIVP], Hrvatski Telekom [ZSE:HT], shipping company Atlantska Plovidba [ZSE:ATPL] and electrical equipment manufacturer Koncar Elektroindustrija [ZSE:KOEI], bourse data showed.