"Dolgov". astronautix.com. 27 September 2011 tarixində orijinalından arxivləşdirilib. İstifadə tarixi: 6 September 2011.
Dolgov's year of death is given as both 1961 and 1962 by the Encyclopedia AstronauticaArxivləşdirilib 2011-09-02 at the Wayback Machine, but as 1962 by Goebel and at warheroes.ru. 1962 is correct, as shown by the Der Spiegel obituary cited below.
Dolgov's year of death is given as both 1961 and 1962 by the Encyclopedia AstronauticaArxivləşdirilib 2011-09-02 at the Wayback Machine, but as 1962 by Goebel and at warheroes.ru. 1962 is correct, as shown by the Der Spiegel obituary cited below.