Bondesen, A. Is it a group table? (Danish) Zbl 0197.29401 Nordisk Mat. Tidskr. 17, 132-136 (1969). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:generalized groups, semigroups × Cite Format Result Cite Review PDF