1. Akman V, Surav M (1996) Steps toward formalizing context. AI Mag 17(3):55–72
2. Atkinson M, Bancilhon F, DeWitt D, Dittrich K, Maier D, Zdonik S (1989) The object-oriented database system manifesto. In: Proceedings of the first international conference on deductive and object-oriented databases, Kyoto, Japan, pp 223–240
3. Barwise J, Perry J (1983) Situations and attitudes. Bradford Books/MIT Press, Cambridge
4. Barwise J, Seligman J (1997) Information flow. The logic of distributed systems. Cambridge University Press
5. Binding C, Tudhope D (2004) KOS at your service: programmatic access to knowledge organisation systems. J Digital Inform 4(4). http://www.jodi.ecs.soton.ac.uk/Articles/vo4/io4/Binding/