Agents and Multi-agent Systems: Technologies and Applications 2019: 13th KES International Conference, KES-AMSTA-2019 St. Julians, Malta, June 2019 Proceedings - Jezic; Chen-Burger, Yun-Heh Jessica; Howlett, Robert J.; Jain, Lakhmi C.; Kusek, Mario; Sperka, Roman (Springer Singapore, 2020)