Robert Demolombe, Luis Fariñas del Cerro. Towards a Logical Characterization of Sentences of the Kind "Sentence ::::p:::: is about Object ::::c::::". In Steffen Hölldobler, editor, Intellectics and Computational Logic (to Wolfgang Bibel on the occasion of his 60th birthday). Volume 19 of Applied Logic Series, pages 85-99, Kluwer, 2000.
Abstract is missing.