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D. Gabbay and J. Woods . 2005. The Reach of Abduction: Insight and Trial. Amsterdam: North-Holland.
S. O. Hansson 1999. A Textbook of Belief Dynamics. Dordrecht: Springer.
H. Hosni 2014. Towards a Bayesian theory of second-order uncertainty: lessons from non-standard logics. In David Makinson on Classical Methods for Non-Classical Problems, ed. S. O. Hansson , 195–221. Outstanding Contributions to Logic Volume 3. Dordrecht: Springer.
J.B. Paris and A. Vencovská . 1993. A model of belief. Artificial Intelligence 64: 197–241.