Steven J . Brams, Peter C . Fishburn, and Samuel Merrill The Responsiveness of Approval Voting: Comments on Saari and Van Newenhizen articleThe Responsiveness of Approval Voting: Comments on Saari and Van NewenhizenSteven J . Brams, Peter C . Fishburn, and Samuel MerrillPublic Choice, vol. 59, no. 2, 1988, pp. 121–131PDF