Agents and Artificial Intelligence 9th International Conference, ICAART 2017, Porto, Portugal, February 24-26, 2017, Revised Selected Papers - van den Herik, Jaap; van den Herik, Jaap; Rocha, Ana Paula; Rocha, Ana Paula; Filipe, Joaquim; Filipe, Joaquim (Springer International Publishing : Imprint: Springer, 2018)