Hugues Leblanc. Semantic deviations. Truth, syntax and modality, Proceedings of the Temple University Conference on Alternative Semantics, edited by Hugues Leblanc, Studies in logic and the foundations of mathematics, vol. 68, North-Holland Publishing Company, Amsterdam and London1973, pp. 1–16. - Hugues Leblanc and George Weaver. Truth-functionality and the ramified theory of types. Truth, syntax and modality, Proceedings of the Temple University Conference on Alternative Semantics, edited by Hugues Leblanc, Studies in logic and the foundations of mathematics, vol. 68, North-Holland Publishing Company, Amsterdam and London1973, pp. 148–167.