References
Howie, J. M.,An Introduction to Semigroup Theory, London: Academic Press, 1976.
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Communicated by R. McFadden
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Hutchins, H. Division semirings with 1+1=1. Semigroup Forum 22, 181–188 (1981). https://doi.org/10.1007/BF02572796
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DOI: https://doi.org/10.1007/BF02572796