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Continue to ChatOn Abelian Semigroup Presentations - https://avesis.cu.edu.tr/yayin/a0b2930f-d393-4e89-af2b-976dd4db305d/on-abelian-semigroup-presentations
On Abelian Semigroup Presentations - https://avesis.cu.edu.tr/yayin/a0b2930f-d393-4e89-af2b-976dd4db305d/on-abelian-semigroup-presentations