Willem Elders gave lectures in the following countries and cities:
NL:
Amsterdam, Delft, Den Haag, Groningen, Leiden, Maastricht, Middelburg, Rotterdam, ‘s-Hertogenbosch, Tilburg, Utrecht
B:
Leuven, Mechelen
F:
Avignon, Saintes
D:
Bremen, Köln, München, Münster (Wf.), Niederaltaich, Stuttgart, Wolfenbüttel
GB:
London
IT:
Novacella
Pl:
Bydgoszcz, Gdansk, Kraków, Warszawa
CZ:
Praha
BG:
Sofiya
USA:
Berkeley, New York
CN:
Hong Kong