Hierarchical Model and Communication by Signs, Signals and Symbols in Multi-Agent Environments. - Brahim Chaib-draa; Pascal Levesque (MAAMAW, 1994)

Hierarchical model and communication by signs, signals and symbols in multiagent environments. - Brahim Chaib-draa; Pascal Levesque (J. Exp. Theor. Artif. Intell., 1996)