Fuzzy logic theory and applications:

[1] Fisher, Peter (2000), Fuzzy modelling, in Geocomputation, Openshaw, S. and R. J. Abrahart (eds), Taylor & Francis

[2] Klir, J.George, Clair, St., Ute and Juan, Bo (1997), Fuzzy set theory: foundations and applications. Prentice Hall, Upper Saddle River, NJ

[3] Kosko Bart (1992), Neural networks and fuzzy systems. Prentice Hall, Englewood Cliffs, NJ

[4] Kosko Bart (1994), Fuzzy thinking- the new science of fuzzy logic. Flamingo Harper Collins

[5] Leung (1984), Fuzzy sets approach to spatial analysis and planning. A nontechnical evaluation. Occasional paper no 39, Department of Geography and Geographical Research Centre, The Chinese University of Hong Kong.

[6] Openshaw, Stan and Openshaw, Christine (1997), Artificial Intelligence in Geography. John Wiley & Sons

[7] Zadeh, L.A (1965), Fuzzy Sets, Information and Control, 8, 338-353

Knowledge Representation:

[8] Reichgeilt, Han (1991), Knowledge Representation: an AI perspective. Ablex Publishing Corporation, Norwood, NJ

[9] Russell, Stuart, J. and Norvig, Peter (1995), Artificial Intelligence: a modern approach. Prentice Hall, Englewood Cliffs, NJ

[10] Sowa, John F. (2000), Knowledge Representation. Logical, Philosophical and Computational Foundations. Brooks/Cole, Pacific Grove, CA