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Zakharov, V.K. Divisible envelopes connected with the regular and rational rings of quotients and the Hausdorff–Sierpiński extensions of the ring of continuous functions. Journal of Mathematical Sciences 110, 2660–2682 (2002). https://doi.org/10.1023/A:1015138915512
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DOI: https://doi.org/10.1023/A:1015138915512