Elinor Ostrom, James Walker and Roy Gardner (1992), 'Covenants With and Without a Sword: Self-Governance is Possible', American Political Science Review, 86, pp. 404-17.

DOI link for Elinor Ostrom, James Walker and Roy Gardner (1992), 'Covenants With and Without a Sword: Self-Governance is Possible', American Political Science Review, 86, pp. 404-17.

Elinor Ostrom, James Walker and Roy Gardner (1992), 'Covenants With and Without a Sword: Self-Governance is Possible', American Political Science Review, 86, pp. 404-17.