References
Davis, M.; Ruffini, R.; Press, W. H.; and Price, R. H. "Gravitational Radiation from a Particle Falling Radially into a Schwarzschild Black Hole." Phys. Rev. Let. 27, 1466, 1971.
Smarr, L. L. "Space-Time Generated by Computer: Black Holes with Gravitational Radiation." In Eighth Texas Symposium on Relativistic Astrophysics, Annals of the New York Academy of Sciences 302, 569, 1977.
Smarr, L. L. "Gravitational Radiation from Distant Encounters and from Head-On Collisions of Black Holes: The Zero Frequency Limit." Phys. Rev. D 15, 2069, 1977.
