1. W. Boos, Lectures on large cardinal axioms, Proceedings of Kiel Summer School. Springer Lecture Notes No 499.
2. Changing cofinality of a measurable cardinal (an alternative proof) CMUC;Bukovsky,1973
3. L. Bukovsky, To appear.
4. P. Dehornoy, Iterated ultrapowers and Magidor's forcing to appear.
5. Set Theory;Drake,1974