1. 1WernhervonBraun,TheMarsProjectUniversityofIllinoisPress,1962.
2. 2WardKimbell,director,Tomorrowland: MantotheMoonWaltDisneyStudios,1956.
3. 3GeorgevonTiesenhausen,personalcommunication,c.1980.
4. 4StanleyKubrick,director,2001: ASpaceOdysseyMetro-Goldwin-Mayer,1968.
5. 5PeterHyams,director,2010: TheYearWeMakeContactMetro-Goldwin-Mayer,1984.