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Publications of Author

1. Sigrid Ewert, Andries P. J. van der Walt
   The Power and Limitations of Random Context. [Citation Graph (0, 0)][DBLP]
   Grammars and Automata for String Processing, 2003, pp:33-44 [Conf]
   
2. Frank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt
   Bag Context Tree Grammars. [Citation Graph (0, 0)][DBLP]
   Developments in Language Theory, 2006, pp:226-237 [Conf]
   
3. Frank Drewes, Sigrid Ewert, Renate Klempien-Hinrichs, Hans-Jörg Kreowski
   Computing Raster Images from Grid Picture Grammars. [Citation Graph (0, 0)][DBLP]
   CIAA, 2000, pp:113-121 [Conf]
   
4. Sigrid Ewert, Andries P. J. van der Walt
   Generating Pictures Using Random Forbidding Context. [Citation Graph (0, 0)][DBLP]
   IJPRAI, 1998, v:12, n:7, pp:939-950 [Journal]
   
5. Sigrid Ewert, Andries P. J. van der Walt
   A Hierarchy Result for Random Forbidding Context Picture Grammars. [Citation Graph (0, 0)][DBLP]
   IJPRAI, 1999, v:13, n:7, pp:997-1008 [Journal]
   
6. Sigrid Ewert, Andries P. J. van der Walt
   Generating Pictures Using Random Permitting Context. [Citation Graph (0, 0)][DBLP]
   IJPRAI, 1999, v:13, n:3, pp:339-355 [Journal]
   
7. Frank Drewes, Sigrid Ewert, Renate Klempien-Hinrichs, Hans-Jörg Kreowski
   Computing Raster Images from Grid Picture Grammars. [Citation Graph (0, 0)][DBLP]
   Journal of Automata, Languages and Combinatorics, 2003, v:8, n:3, pp:499-519 [Journal]
   
8. Sigrid Ewert, Andries P. J. van der Walt
   Shrink Indecomposable Fractals. [Citation Graph (0, 0)][DBLP]
   J. UCS, 1999, v:5, n:9, pp:521-531 [Journal]
   
9. N. Boden, B. Atcheson, Sigrid Ewert
   GRIFFIN : an automated grcpg and IFS processing tool. [Citation Graph (0, 0)][DBLP]
   South African Computer Journal, 2004, v:33, n:, pp:24-37 [Journal]
   
10. Frank Drewes, Christine du Toit, Sigrid Ewert, Johanna Högberg, Brink van der Merwe, Andries P. J. van der Walt
    Random context tree grammars and tree transducers. [Citation Graph (0, 0)][DBLP]
    South African Computer Journal, 2005, v:34, n:, pp:11-25 [Journal]
    
11. Sigrid Ewert, T. Wessels
    Processing context-sensing picture grammars on a network. [Citation Graph (0, 0)][DBLP]
    South African Computer Journal, 2001, v:27, n:, pp:57-63 [Journal]
    
12. Sigrid Ewert, Andries P. J. van der Walt
    A pumping lemma for random permitting context languages. [Citation Graph (0, 0)][DBLP]
    Theor. Comput. Sci., 2002, v:270, n:1-2, pp:959-967 [Journal]
    
13. Andries P. J. van der Walt, Sigrid Ewert
    A shrinking lemma for random forbidding context languages. [Citation Graph (0, 0)][DBLP]
    Theor. Comput. Sci., 2000, v:237, n:1-2, pp:149-158 [Journal]
    
14. Andries P. J. van der Walt, Sigrid Ewert
    A property of random context picture grammars. [Citation Graph (0, 0)][DBLP]
    Theor. Comput. Sci., 2003, v:1, n:301, pp:313-320 [Journal]