6Marvin Cooper, Congressional investigations, First Amendment Freedoms and Due Process of Law, 11 Hastings L.J. 322 1959 - 1960.
7The 1992 - 93 staff of the legislative Research Bureau, An Overview of congressional investigation of the Executive: Procedures, Devices, and Limitations of Congressional investigative Power, 1 Syracuse J. Legis. & Pol'y 1 1995.
8Walter Hoffmann, The legitimate functions of a congressional investigation, Rutgers law Review, Vol. 9,No. 3.
9Matthew Mantel, Congressional Investigations: A Bibliography. William P. Marshall, The limits on congress's authority to investigate the president, 2004 U. Ill. L. Rev. p.796.
10Brest, Levinson, Balkin, Amar, Siegel, Process of Constitutional Decisionmaking : Cases and Materials , Fifth Edition ,2006 by Aspen Publishers ,Inc.
