- Hofmann, Karl Heinrich, 1932- (4)
- Berglund, John F. (1)
- Clifford, A. H. (Alfred Hoblitzelle), 1908- (1)
- Conference on Semigroups (1)
- Hofmann, Karl Heinrich (1)
- International Conference "Algebraic Theory of Semigroups and Its Applications" (1)
- Jürgensen, Helmut, 1942- (1)
- Mislove, Michael W. (1)
- Morris, Sidney A., 1947- (1)
- Weinert, Hanns Joachim, 1927- (1)