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References
Nicola Guarino
Formal ontology, knowledge representation and conceptual modelling: old inspirations, still unsolved problems![Open Access Link](images/OAlink.png)
2006
in: Conceptual structures: inspiration and application, Dordrecht : Springer
![Open Access Link](images/OAlink.png)
2006
in: Conceptual structures: inspiration and application, Dordrecht : Springer