@InProceedings{thielscher:ILPS93,
  author = 	"Steffen H{\"o}lldobler and Michael Thielscher",
  title = 	"Actions and {S}pecificity",
  booktitle =   "Proceedings of the International Logic Programming
		 Symposium (ILPS)",
  year = 	"1993",
  editor = 	"D.\ Miller",
  pages =	"164--180",
  publisher = 	"MIT Press",
  address =	"Vancouver",
  month =       oct
}