 Consistency of the Continuum Hypothesis. (AM3) by Kurt Godel, 01 September, 1940
 Real Numbers, Generalizations of the Reals, and Theories of Continua (Synthese Library, 242) by Philip Ehrlich, August, 1994
 Set Theory and the Continuum Problem (Oxford Logic Guides, 34) by Raymond M. Smullyan, Melvin Fitting, July, 1997
 Set Theory and the Continuum Hypothesis by Paul J. Cohen, March, 1998
