a . Arp, Quasars, Redshifts, and Controversies.
u Fred Hoyle and Jayant V. Narlikar, “On the Nature of Mass,” Nature, Vol. 233, 3 September 1971, pp. 41–44.
u William Kaufmann III, “The Most Feared Astronomer on Earth,” Science Digest, July 1981, pp. 76–81, 117.
u Geoffrey Burbidge, “Redshift Rift,” Science 81, December 1981, p. 18.