@Misc{alti:alf94,
  author = 	 "Thorsten Altenkirch and Veronica Gaspes and Bengt
		  {Nordstr\"om} and {Bj\"orn} von Sydow",
  title = 	 "A user's guide to {ALF}",
  year =	 "1994",
  month =	 "May",
  howpublished = "available from http://www.cs.nott.ac.uk/\~{}txa/publ/alf94.pdf",
  note = 	 "{Department of Computing Science, 
		   University of G\"{o}teborg/Chalmers}",
  url =	"http://www.cs.nott.ac.uk/~txa/publ/alf94.pdf"
}