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ØGAARD, Tore Fjetland. Simplified Semantics for Further Relevant Logics I: Unreduced Semantics for E and Π′. Logic and Logical Philosophy. Online. 27 August 2024. Vol. 34, no. 1, pp. 109-151. [Accessed 7 May 2025]. DOI 10.12775/LLP.2024.021.