@InProceedings{FerSti_j2011, author = {Henning~Fernau and Ralf~Stiebe}, title = {{{\"U}ber CD Grammatiksysteme mit Valenzregeln}}, booktitle = {21. Theorietag "`Automaten und Formale Sprachen"', Allrode (Harz), 27.--29.9.2011, Tagungsband}, pages = {33--36}, year = 2011, editor = {J{\"u}rgen~Dassow and Bianca~Truthe}, organization = {Otto-von-Guericke-Universit{\"a}t Magdeburg, Fakult{\"a}t f{\"u}r Informatik} }