@TECHREPORT{Das_j2000, author = {J{\"u}rgen~Dassow}, title = {{Evolution and grammars. IX Tarragona Seminar on Formal Syntax and Semantics}}, institution = {Universitat Roviri i Virgili Tarragona, Research Group on Mathematical Linguistics}, series = {Report}, year = 2000, number = {12/00} }