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December 1991A note and correction on Zbigniew Lis' contributions to the tree method: ``From semantic tableaux to Smullyan trees: a history of the falsifiability tree method''
I. H. Anellis "A note and correction on Zbigniew Lis' contributions to the tree method: ``From semantic tableaux to Smullyan trees: a history of the falsifiability tree method''," Modern Logic, Mod. Log. 2(2), 219, (December 1991)
