* [{{cita web|http://en.rian.ru/russia/20061018/54922208.html|Russia New Russian spaceship will be able to fly to Moon - space corp]}}
* [{{cita web|http://www.energia.ru/english/energia/news/news-2006/public_07-01.html|RSC Energia: Concept Of Russian Manned Space Navigation Development]}}
*Mir Hardware Heritage
**David S.F. Portree, ''[http://spaceflight.nasa.gov/history/shuttle-mir/references/r-documents-mirhh.htm Mir Hardware Heritage]'', NASA RP-1357, [[1995]]