Gerbrandy, Jelle; Groeneveld, Willem (1997-04-01). "Reasoning about Information Change". Journal of Logic, Language and Information. 6 (2): 147–169. doi:10.1023/A:1008222603071. ISSN0925-8531. S2CID1700635.
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Gerbrandy, Jelle; Groeneveld, Willem (1997-04-01). "Reasoning about Information Change". Journal of Logic, Language and Information. 6 (2): 147–169. doi:10.1023/A:1008222603071. ISSN0925-8531. S2CID1700635.
Gerbrandy, Jelle; Groeneveld, Willem (1997-04-01). "Reasoning about Information Change". Journal of Logic, Language and Information. 6 (2): 147–169. doi:10.1023/A:1008222603071. ISSN0925-8531. S2CID1700635.