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

1999a [Gaya scienza. Nietzsche as a friend] (dissertation Erasmus University Rotterdam), Baarn: Agora

1998a [A short history of reason], Amsterdam: Stichting Neerlandistiek VU

2003/4 Gaya scienza: Nietzsche as a friend, in: New Nietzsche Studies 5/6: 89-104

2001 Nietzsche's tone, A philologist's answer to the rise of linguistics, in: Beiträge zur Geschichte der Sprachwissenschaft 11, 89-116

2000e [The law of ebb and flood], in: Katja Rodenburg, Monic Schijvenaars, Paul van Tongeren, eds., [Reading Nietzsche. Nineteen philosophers on their first acquaintance], Budel: Damon, 47-49

2000d [Nietzsche's tone. A philologist's answer to the rise of linguistics], in: Meesterwerk 18, 19-24

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

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

1998 Henry Sweet Society, Fifteenth Annual Colloquium, Amsterdam (16-19 September); Paper: Nietzsche's tone

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