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© 1993 Springer-Verlag Berlin Heidelberg
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Hájek, P. (1993). Epistemic entrenchment and arithmetical hierarchy (abstract). In: Gottlob, G., Leitsch, A., Mundici, D. (eds) Computational Logic and Proof Theory. KGC 1993. Lecture Notes in Computer Science, vol 713. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0022550
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DOI: https://doi.org/10.1007/BFb0022550
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