Fischer, 2008, p. 36. Fischer, Benjamin (2008). «The Spy Who Came in for the Gold: A Skeptical View of the GTVANQUISH Case». Journal of Intelligence History8 (1): 29-54. doi:10.1080/16161262.2008.10555148.
Fischer, 2008, p. 53. Fischer, Benjamin (2008). «The Spy Who Came in for the Gold: A Skeptical View of the GTVANQUISH Case». Journal of Intelligence History8 (1): 29-54. doi:10.1080/16161262.2008.10555148.
Fischer, 2008, p. 31. Fischer, Benjamin (2008). «The Spy Who Came in for the Gold: A Skeptical View of the GTVANQUISH Case». Journal of Intelligence History8 (1): 29-54. doi:10.1080/16161262.2008.10555148.
Fischer, 2008, pp. 40-42. Fischer, Benjamin (2008). «The Spy Who Came in for the Gold: A Skeptical View of the GTVANQUISH Case». Journal of Intelligence History8 (1): 29-54. doi:10.1080/16161262.2008.10555148.
Fischer, 2008, pp. 43-44. Fischer, Benjamin (2008). «The Spy Who Came in for the Gold: A Skeptical View of the GTVANQUISH Case». Journal of Intelligence History8 (1): 29-54. doi:10.1080/16161262.2008.10555148.
Fischer, 2008, p. 49. Fischer, Benjamin (2008). «The Spy Who Came in for the Gold: A Skeptical View of the GTVANQUISH Case». Journal of Intelligence History8 (1): 29-54. doi:10.1080/16161262.2008.10555148.
Hoffman, David (Fall 2016). «Tolkachev's Bona Fides». International Journal of Intelligence and CounterIntelligence29 (3): 639-640. doi:10.1080/08850607.2016.1148511.
Fischer, Benjamin B. (Winter 2016). «Tolkachev Evidence Still Skimpy». International Journal of Intelligence and CounterIntelligence29 (4): 846-848. doi:10.1080/08850607.2016.1177413.