References
Abian, A.: The theory of sets and transfinite arithmetic. Philadelphia: W. B. Saunders 1965.
Keisler, H. J., and A. Tarski: From accessible to inaccessible cardinals. Fund. Math.53, 232 (1964).
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Abian, A. On the cofinality of ordinal numbers. Math. Ann. 179, 142–152 (1969). https://doi.org/10.1007/BF01350126
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DOI: https://doi.org/10.1007/BF01350126