‘A simple non-bisimple congruence-free finitely presented monoid’
[with V. Maltcev]
Semigroup Forum, 90, no. 1 (Febuary 2015), pp. 184–188.
DOI: 10.1007/s00233-014-9607-y. MR: 3297818. ZBL: 1317.20049.

Abstract

We exhibit an example of a finitely presented monoid that is congruence-free and simple but not bisimple.