1. Direct Democracy Worldwide;Altman,2011
2. Demanding Choices: Opinion, Voting, and Direct Democracy;Bowler,1998
3. The Referendum of March 12, 1986 on Spain's remaining in NATO;Canals;Elect. Stud.,1986
4. Constitutional referendums and democratic deliberation;Chambers,2001
5. Deliberative democratic theory;Chambers,2003