@proceedings{EndrissEtAlAAMAS2021,
  title =         {Proceedings of the 20th International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2021)},
  editor =        {Ulle Endriss and Ann Now\'e and Frank Dignum and Alessio Lomuscio},
  publisher =     {IFAAMAS},
  month =         {May},
  year =          {2021}
}