@incollection{Das_j2001_b, author = {J{\"u}rgen~Dassow}, title = {{Parikh mapping and iteration}}, booktitle = {{Multiset Processing}}, series = {LNCS}, volume = {2235}, publisher = {Springer-Verlag, Berlin}, year = 2001, editor = {Cristian~S.~Calude and Gheorghe~P\u{a}un and Grzegorz~Rozenberg and Arto~Salomaa}, pages = {85--101}, url = {http://www.springerlink.com/content/tbqrbv4b063kq4jg/?p=13159534db6344d288193bea0554be4f&pi=4} }