Explainable, Transparent Autonomous Agents and Multi-Agent Systems First International Workshop, EXTRAAMAS 2019, Montreal, QC, Canada, May 13-14, 2019, Revised Selected Papers - Calvaresi, Davide; Calvaresi, Davide; Najjar, Amro; Najjar, Amro; Schumacher, Michael; Schumacher, Michael; Främling, Kary; Främling, Kary (Springer International Publishing : Imprint: Springer, 2019)