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Communicated by Karl H. Hofmann
Supported by a Research Stipendium from the Alexander von Humboldt Foundation.
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Jamison, R.E. Tietze's convexity theorem for semilattices and lattices. Semigroup Forum 15, 357–373 (1977). https://doi.org/10.1007/BF02195768
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DOI: https://doi.org/10.1007/BF02195768