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Priss, U.: Facet-like structures in computer science (2008)
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Ganter, B.; Wille, R.: Formal concept analysis : mathematical foundations (1998)
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Kent, R.E.: Implications and rules in thesauri (1994)
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Luksch, P.; Wille, R.: ¬A mathematical model for conceptual knowledge systems (1991)
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Priss, U.; Old, L.J.: Concept neighbourhoods in knowledge organisation systems (2010)
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