1.
The freeliving marine nemas of the Belgian coast: II. With general remarks on the structure and the system of nemas
Differences in shell morphology and reproductive impairment in Littorina littorea along the Belgian coast
Ribkwallen (Ctenophora), schijfkwallen en medusevormende hydroïden (Cnidaria: Scyphozoa, Hydrozoa) te Zeebrugge, resultaten van 5 jaar waarnemingen (1999-2003)