@INPROCEEDINGS{extended, 
   AUTHOR = {M. Hagenbuchner and M. Gori and A.C. Tsoi and H. Bunke and C. Irniger},
   TITLE = {Using attributed Plex Grammars for the generation of Image and Graph Databases},
   BOOKTITLE = {Special issue PRL-Graph-based Representations},
   EDITOR = {Mario Vento},
   YEAR = {2002}}
}