Fiat Boundaries
Barry Smith, "On Drawing Lines on a Map",
in: A. U. Frank and W. Kuhn (eds.), Spatial Information Theory. A Theoretical Basis for GIS (Lecture Notes in Computer Science 988), Berlin/Heidelberg/New York, etc.: Springer, 1995, 475-484.Barry Smith and Achille Varzi, "Fiat and Bona Fide Boundaries",
Philosophy and Phenomenological Research, 60: 2 (March 2000), 401-420."Fiat Objects", Topoi 20: 2, 2001, 131-148)
Barry Smith and David M. Mark, "Do Mountains Exist? Towards an Ontology of Landforms",
Environment and Planning B (Planning and Design), 30(3) (2003), 411-427.