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4. W. W. Comfort and J. van Mill, Extremal pseudocompact Abelian groups are compact metric, Abstracts Amer. Math. Soc. 27 (2006), p. 78 (Abstract #1014-22-958).
5. W. W. Comfort and J. van Mill, Extremal pseudocompact abelian groups: A brief exposé, in preparation.