Reprinted in:
Brachman, Ronald J. & Levesque, Hector J.
(eds.) (1985),
Readings in Knowledge Representation
(Los Altos, CA:
Morgan Kaufmann):
299-307.
Brought up to date in:
Lifschitz, Vladimir;
McCain, Norman;
Remolina, Emilio;
&
Tacchella, Armando
(2000),
"Getting to the Airport:
The Oldest Planning Problem in AI",
in
Jack Minker (ed.),
Logic-Based Artificial Intelligence
(Boston: Kluwer):
147-165.