Extending congruences on factors of ideally compactifiable semigroups. J.A. Hildebrant — 1976 Semigroup forum
The Bohr compactification of a dense ideal in a topological semigroup. J.D. Lawson; J.A. Hildebrant — 1974 Semigroup forum
Compact totally disconnected k-divisible semigroups. J.A. Hildebrant; M.R. Schaferkotter — 1988 Semigroup forum
Embedding compact t-semigroups into compact uniquely divisible semigroups. D.R. Brown; J.A. Hildebrant — 1990 Semigroup forum
Embedding in compact uniquely divisible semigroups. J.D. Lawson; J.A. Hildebrant — 1972 Semigroup forum