1. The independence of the continuum hypothesis;Cohen,1963
2. Set theory and the continuum hypothesis;Cohen,1966
3. The consistency of the axiom of choice and of the generalized continuum hypothesis with the axioms of set theory;Gödel,1940
4. What is Cantor's continuum hypothesis?;Gödel,1964
5. Lectures on Boolean Algebras;Halmos,1963