NB pdf
- Wouters-1989-Proceedings of the Symposium Invertebrates of Belgium-437-442.pdf
- Maelfait, J.-P., Desender, K. & Baert, L. 1989. Some examples of the practical use of spiders and carabid beetles as ecological indicators. Invertebraten van Begië - Invertébrés de Belgique: 437-442