1. Gravitational lens of the Sun: its potential for observations and communications over interstellar distances;Eshleman;Science,1979
2. The gravitational-lens antennas;Kraus,1986
3. Solar sailing for radioastronomy and SETI: an extrasolar mission to 550 A.U.;Matloff,1992
4. Industrial Phase A study, Final report;Quasat;Aeritalia Report QS-RP-AI-004, Torino,1988