Saul A. Kripke. Semantical analysis of modal logic I. Normal modal propositional calculi. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 9 (1963), pp. 67–96.
- 12 March 1966
- journal article
- Published by Cambridge University Press (CUP) in The Journal of Symbolic Logic
- Vol. 31 (1), 120-122
- https://doi.org/10.2307/2270649