@incollection{Das_j1999_b, author = {J{\"u}rgen~Dassow}, title = {{Numerical parameters of evolutionary grammars}}, booktitle = {{Jewels are Forever}}, publisher = springer, year = 1999, editor = {Juhani~Karhum{\"a}ki and Herrmann~A.~Maurer and Gheorghe~P\u{a}un and Grzegorz~Rozenberg}, pages = {171--181} }