Ifcolog Journal of Logics and their Applications. Hilbert's epsilon and tau in Logic, Informatics and Linguistics Volume 4, Number 2, March 2017 Heftet / 2017 / Engelsk
Logical Aspects of Computational Linguistics First International Conference, LACL '96, Nancy, France, September 23-25, 1996. Selected Papers Retore Christian Heftet / 1997 / Engelsk
Logical Aspects of Computational Linguistics 4th International Conference, LACL 2001, Le Croisic, France, June 27-29, 2001, Proceedings Groote Philippe de Heftet / 2001 / Engelsk
Logic of Categorial Grammars A deductive account of natural language syntax and semantics Moot Richard Heftet / 2012 / Engelsk
