Intelligent Agents: Specification, Modeling, and Application 4th Pacific Rim International Workshop on Multi-Agents, PRIMA 2001, Taipei, Taiwan, July 28-29, 2001, Proceedings - Yuan, Soe-Tsyr; Yuan, Soe-Tsyr; Yokoo, Makoto; Yokoo, Makoto (Springer Berlin Heidelberg : Imprint: Springer, 2001)