Frank Drewes, Annegret Habel, Hans-Jörg Kreowski, Stefan Taubenberger: Generating self-affine fractals by collage grammars. In G. Rozenberg, A. Salomaa, editors, Proc. Developments in Language Theory 93. At the Crossroads of Mathematics, Computer Science and Biology, pages 278-289. World Scientific, 1994. Long version appeared in Theoretical Computer Science.
Frank Drewes: A lower bound on the growth of functions computed by tree transductions. In S. Tison, editor, Proc. CAAP'94, volume 787 of Lecture Notes in Computer Science, pages 100-114. Springer, 1994. Revised version in Fundamenta Informaticae 26.
Frank Drewes: The Use of Tree Transducers to Compute Translations Between Graph Algebras. Report 8/94, Univ. Bremen, 1994.
Renate Klempien-Hinrichs: Node Replacement in Hypergraphs: Comparison with Hyperedge Replacement, and Confluence. In Preproc. GRAGRA'94, pages 37-42. 1994. Revised version appeared in LNCS 1073.
Hans-Jörg Kreowski: An Axiomatic Approach to Canonical Derivations. In Proc. IFIP World Computer Congress, volume A-51 of IFIP-Transactions, pages 348-353. North-Holland, 1994.
