Russ Bellant interviewed by Paul H. Rosenberg - Secret Ukraine
Silver, Arnold M. "Questions, Questions, Questions: Memories of Oberursel," Studies in Intelligence, Vol. 37, No. 5 (1994): 81-90
Per Anders Rudling - The OUN, the UPA and the Holocaust: A Study in Manufacturing of Historical Myth (2011)
Soviet Penetration and Use of the ABN and Central European Federal Club
The Prchala Movement
Subject: ZIPPER Report on the PRCHALA Movement
Paper Mills and Fabrication (February 1952)