2008. Frederick Forsyth, The Deceiver, Bantam Books, 1992 , p. 43, 4th line. Viktor Suvorov, Devil's Mother, Sofia, Fakel Express, 2011 , in Bulgarian language. External links John Simkin. Oleg Penkovsky, Spartacus Educational cia.gov The Capture and Execution of Colonel Penkovsky, 1963 Joseph J. Bulik. Oral History, Penkovsky's CIA case officer 'Fatal Encounter' BBC TV documentary 3 May 1991, KGB, MI6 and CIA officers involved with the Penkovsky reveal their stories 1919 births 1963 deaths Soviet people executed for spying for the United States British spies against the Soviet Union GRU officers People from Vladikavkaz Russian people executed by the Soviet Union Executed people from North Ossetia–Alania Executed Soviet people from Russia Soviet military attachés Double agents