1999b [Laughing at oneself], Utrecht: Stichting WeTeN

1999a [Gaya scienza, Nietzsche as a friend], Baarn: Agora

2000c [Gay science of language], in: Nieuwsbrief 20, 38-41

2000b [In praise of Folly], in: Noot 7, 5-7

1992b [Uncontrollable laughter. On topic formation in theories of language], in: Ronald Commers, ed., Acta filosofiedag 1990, Delft: Eburon, 113-116

1993 International Conference on Humor and Laughter, International Society for Humor Studies, Luxemburg (30 September-3 October); Paper: The fool and the troubadour in Friedrich Nietzsche's Gay Science

1992 Tenth International Humor Congress, Association française pour le développement des recherches sur le comique, le rire et l'humour/International Society for Humor Studies, Paris (6-9 July); Paper: The laughter of science

1990 International Pragmatics Conference, IPrA, Barcelona (9-13 July); Poster: Ideology, discourse, and the object of pragmatics. The case of laughter