John-Thor Dahlberg, « Voronzeh Scientist Quoted by Tass Casts Doubt on UFO Landing Story », Associated Press, (lire en ligne, consulté le )
nytimes.com
Esther B. Fein et Special To The New York Times, « U.F.O. Landing Is Fact, Not Fantasy, the Russians Insist », The New York Times, , p. 6 (lire en ligne)
