The Williams conjecture is false for irreducible subshifts. Kim, K.H.; Roush, F.W. — 1999 Annals of Mathematics. Second Series
The Williams conjecture is false for irreducible subshifts. Kim, K.H.; Roush, F.W. — 1997 Electronic Research Announcements of the American Mathematical Society [electronic only]
Inert actions on periodic points. Kim, K.H.; Roush, F.W.; Wagoner, J.B. — 1997 Electronic Research Announcements of the American Mathematical Society [electronic only]
On generating regular elements in the semigroup of binary relations. F.W. Roush; K.H. Kim — 1977 Semigroup forum