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Wikipedia: Valery Bykovsky

Wikipedia: List of astronauts by year of selection

Wikipedia: Aleksei Gubarev

Anchor text: GCTC, Biographies of Cosmonauts: Solovyev, Anatoly Yakovlevich

Wikipedia: Anatoly Solovyev

Wikipedia: Zvezda (ISS module)

Wikipedia: Zarya (ISS module)

Anchor text: ПОЛЯКОВ Валерий Владимирович

Wikipedia: Valeri Polyakov

Anchor text: Gagarin Cosmonauts Training Centre (GCTC)

Wikipedia: Star City, Russia

Anchor text: GCTC, Biographies of Cosmonauts: Solovyev, Anatoly Yakovlevich

Wikipedia: List of spaceflight records

Wikipedia: Soyuz-TM