@proceedings{DasRozSal_j1996, editor = {J{\"u}rgen~Dassow and Grzegorz~Rozenberg and Arto~Salomaa}, title = {{Developments in Language Theory II, At the Crossroads of Mathematics, Computer Science and Biology, Magdeburg, Germany, 17-21 July 1995}}, publisher = worldsci, year = 1996, isbn = {981-02-2682-9} }