@inproceedings{Straccia06b,
 Author = {Straccia, Umberto},
 Booktitle = {Proceedings of the 11th International Conference on Information Processing 
and Management of Uncertainty in Knowledge-Based Systems, (IPMU-06)},  
 Title = {Annotated Answer Set Programming}, 
pages = {1212-1219},
 Year = {2006}}