@inbook {10,
	title = {Roles in MAS: Managing the Complexity of Tasks and Environments},
	booktitle = { An Application Science for Multi-Agent Systems},
	volume = {10},
	year = {2005},
	pages = {133-154},
	publisher = {Spinger US},
	organization = {Spinger US},
	doi = {10.1007/1-4020-7868-4_8},
	author = {I. Partsakoulakis and G. Vouros}
}
