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Joseph Auslander: Minimal flows with a closed proximal cell.
Ergodic Theory Dyn. Syst. 21/3 (2001), 641-645.

Joseph Auslander/Shmuel Glasner: Distal and highly proximal extensions
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Joseph Auslander/B. Horelick: Regular minimal sets II. The proximally
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Clay: Proximality relations in transformation groups.
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Robert Ellis/Shmuel Glasner/Shapiro: Proximal isometric flows.
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807 Shmuel Glasner: Proximal flows. SLN Math. 517 (1976).

Harvey Keynes: On the proximal relation being closed.
Proc. AMS 18 (1967), 518-522.

10565 Harvey Keynes: The proximal relation in a class of substitution
minimal sets. Math. Systems Theory 1 (1967), 165-174.

Harvey Keynes: A study of the proximal relation in coset transformation
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McMahon: On proximal and distal extensions of minimal sets.
Bull. Inst. Math. Ac. Sinica 2 (1974), 93-107.

17246 T. Moothathu: Reporting some papers on scrambled sets. Internet ca. 2004, 22p.
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7900 Leonard Shapiro: Proximality in minimal transformation groups.
Proc. AMS 26 (1970), 521-525.

7899 Leonard Shapiro: Distal and proximal extensions of minimal flows.
Math. Systems Theory 5 (1971), 76-88.