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Landis, Geoffrey A. (2001). «Exploring Venus by Solar Airplane». AIP Conference Proceedings. American Institute of Physics. 522: 16–18. Bibcode:2001AIPC..552...16L. doi:10.1063/1.1357898.
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Marov, Mikhail Ya. (2004). «Mikhail Lomonosov and the discovery of the atmosphere of Venus during the 1761 transit». Proceedings of the International Astronomical Union. Cambridge University Press. 2004 (IAUC196): 209–219. Bibcode:2005tvnv.conf..209M. doi:10.1017/S1743921305001390.
Landis, Geoffrey A. «Atmospheric Flight on Venus»(PDF). Proceedings. 40th Aerospace Sciences Meeting and Exhibit sponsored by the American Institute of Aeronautics and Astronautics. Arkivert fra originalen(PDF) 16. oktober 2011.«Arkivert kopi»(PDF). Arkivert fra originalen(PDF) 16. oktober 2011. Besøkt 10. august 2011.
Landis, Geoffrey A. «Atmospheric Flight on Venus»(PDF). Proceedings. 40th Aerospace Sciences Meeting and Exhibit sponsored by the American Institute of Aeronautics and Astronautics. Arkivert fra originalen(PDF) 16. oktober 2011.«Arkivert kopi»(PDF). Arkivert fra originalen(PDF) 16. oktober 2011. Besøkt 10. august 2011.