publication venue for
- On finitely related semigroups 2013
- Zebra factorizations in free semigroups 2004
- Generating singular transformations 2001
- The class of prime semilattices is not finitely axiomatizable 1997
- PERMUTABLE TRANSFORMATION SEMIGROUPS 1993
- ON DOS LANGUAGES AND DOS MAPPINGS 1984
- ON THE SIZE OF THE ALPHABET AND THE SUBWORD COMPLEXITY OF SQUARE-FREE DOL LANGUAGES 1983