@article {michael09,
	title = {Specifying and Monitoring Economic Environments using Rights and Obligations},
	journal = {Autonomous Agents \& Multi-Agent Systems},
	volume = {20},
	year = {2009},
	pages = {158{\textendash}197},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/loizos09.pdf},
	author = {Loizos Michael and David C. Parkes and Avi Pfeffer}
}
