Machine-Assisted Election Auditing
by Joseph A. Calandrino, J. Alex Halderman, and Edward W. Felten

Security Analysis of the Diebold AccuVote-TS Voting Machine
by Ariel J. Feldman, J. Alex Halderman, and Edward W. Felten

Ceci n’est pas une urne: A report on a French internet election
by Andrew W. Appel

Andrew W. Appel’s testimony in the New Jersey voting machines lawsuit, 2005-06

Election Machinery, a course taught by Andrew W. Appel at Princeton University in 2004