Modal logic for philosophers por Garson, James W. 1943-

Conditionals and modularity in general logics por Gabbay, Dov M. 1945-

Available for University of the Philippines Diliman via SpringerLink. Click here to access

Aristotle's modal proofs Prior analytics A8-22 in predicate logic por Rini, Adriane

Available for University of the Philippines Diliman via SpringerLink. Click here to access

Gentzen calculi for modal propositional logic por Poggiolesi, Francesca. 1980-

Available for UP System via SpringerLink.

Modality metaphysics, logic, and epistemology

A new introduction to modal logic por Hughes, G. E. (George Edward) 1918-

Ontology, modality, and the fallacy of reference por Jubien, Michael

The logic of provability por Boolos, George

The nature of all being a study of Wittgenstein's modal atomism por Bradley, Raymond

Languages of possibility an essay in philosophical logic por Forbes, Graeme