Ej. Copeland et al., BLACK-HOLES AND GRAVITATIONAL-WAVES IN CONCERT - A PROBE OF SUPERSTRING COSMOLOGY, General relativity and gravitation, 30(12), 1998, pp. 1711-1715
Two strands of observational gravitation, one the search for astrophys
ical evidence of primordial black holes and the other the search for g
ravitational waves, may combine to provide strong evidence in favour o
f cosmological models based on superstring theory, the leading candida
te for unifying gravity with the other fundamental forces.