1. VIRGO: Proposal for the Construction of a Very Large Baseline Interferometric Antenna for Gravitational Wave Detection, Proposal to INFN, Italy;Bradaschia,1989
2. VIRGO: Proposal for the Construction of a Very Large Baseline Interferometric Antenna for Gravitational Wave Detection, Proposal to INFN, Italy;Bradaschia,1992
3. VIRGO: Proposal for the Construction of a Very Large Baseline Interferometric Antenna for Gravitational Wave Detection, Proposal to INFN, Italy;Bradaschia,1995
4. Proposal for the Construction of a Large Interferometric Detector of Gravitational Waves, Proposal to the National Science Foundation;Vogt,1989
5. Progress with the Graching 30-meter Prototype for a Gravitational Wave Detector;Shoemaker,1985