[EN] This paper briefly introduces a summary of the special session on Hybrid Reasoning and Coordination Methods on Multi-Agent Systems, held in conjunction with the 4th International Conference on Hybrid Artificial Intelligence Systems 2009 (HAIS’09). The research papers of this session have been revised and extended and the final results are published in this journal special issue.This special session was supported by CONSOLIDERINGENIO 2010 under grant CSD2007-00022 and by the Spanish government and GVA funds under TIN2006-14630-C0301 and PROMETEO/2008/051 projects.Heras Barberá, SM.; Navarro Llácer, M.; Julian Inglada, VJ. (2009). Hybrid Reasoning and Coordination Methods on Multi-Agent Systems. Journal of Physical Agents. 3(3):1-...