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 ... more
