Scott-Fordsmand, J. J., Weeks, J. M., Sheppard, S. (red.), Bembridge, J. (red.), Holmstrup, M. (red.) & Posthuma, L. (red.) (1998).
Review of Selected Biomarkers in Earthworms. I S. Sheppard, J. Bembridge, M. Holmstrup & L. Posthuma (red.),
Advances in Earthworm Ecotoxicology: Proceedings of the Second International Workshop on Earthworm Ecotoxicology, Amsterdam, The Netherlands, April 1997 (s. 173-189). Pensacola, FL: Society of Environmental Toxicology and Chemistry (SETAC).
Ferguson, C., Darmendrail, D., Freier, K., Jensen, B. K.
, Jensen, J., Kasamas, H., Urzelai, A. & Vegter, J. (red.) (1998).
Risk Assessment for Contaminated Sites in Europe: Vol 1: Scientific Basis. Nottingham: LQM Press.
Axelsen, J. A., Holmstrup, M., Sheppard, S. (red.), Bembridge, J. (red.), Holmstrup, M. (red.) & Posthuma, L. (red.) (1998).
Simulation of Pesticide Effects on Populations of 3 Species of Earthworms. I S. Sheppard, J. Bembridge, M. Holmstrup & L. Posthuma (red.),
Advances in Earthworm Ecotoxicology: Proceedings of the Second International Workshop on Earthworm Ecotoxicology, Amsterdam, The Netherlands, April 1997 (s. 281-294). Pensacola, FL: Society of Environmental Toxicology and Chemistry (SETAC).