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February 1995 Perfectness and semiperfectness of abelian $*$-semigroups without zero
Nobuhisa SAKAKIBARA
Hokkaido Math. J. 24(1): 113-125 (February 1995). DOI: 10.14492/hokmj/1380892538
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Vol.24 • No. 1 • February 1995
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