1. Spencer Abraham . 2000 . "Testimony on Campaign Finance Reform ." United States Senate, Committee on Rules and Administration. May 17.
2. Scott E. Adler, Michael Berry, Cherie Maestas, and John Wilkerson . 2005 . "The Politics of Legislative Specialization: Issues and Considerations in Measurement, 96th-105th Congresses ." Presented at the 2005 meeting of the Midwest Political Science Association.
3. The Macropolitics of Congress
4. Comparable Preference Estimates across Time and Institutions for the Court, Congress, and Presidency