1. Steady Growth Seen for Commercial Space;Lenorovitz;Aviation Week & Space Technology,1993
2. Europe's Rocket has Become Launcher to the World;Heydon;Ad Astra,1991
3. Ariane Launches Japanese Communications Satellite;Covault;Aviation Week & Space Technology,1992
4. Lockheed, Khrunichev to Market Proton Launcher;Lenorovitz;Aviation Week & Space Technology,1993
5. America Takes a Long March into Space;Stern;Spaceflight,1990