On the expressive power of the shuffle operator matched with intersection by regular sets.

Joanna Jedrzejowicz Andrzej Szepietowski On the expressive power of the shuffle operator matched with intersection by regular sets. 379-388 2001 35 ITA 4 http://dx.doi.org/10.1051/ita:2001125 db/journals/ita/ita35.html#JedrzejowiczS01