Calculation of the EC50 and its confidence interval when subtoxic stimulus is presentVAN EWIJK, P. H; HOEKSTRA, J. A.Ecotoxicology and environmental safety (Print). 1993, Vol 25, Num 1, pp 25-32, issn 0147-6513Article

Alternatives for the no-observed-effect levelHOEKSTRA, J. A; VAN EWIJK, P. H.Environmental toxicology and chemistry. 1993, Vol 12, Num 1, pp 187-194, issn 0730-7268Article

The analysis of lattice square designsWILLIAMS, E. R; RATCLIFF, D; VAN EWIJK, P. H et al.Journal of the Royal Statistical Society. Series B. Methodological. 1986, Vol 48, Num 3, pp 314-321, issn 0035-9246Article

The bounded effect concentration as an alternative to the NOECHOEKSTRA, J. A; VAN EWIJK, P. H.Science of the total environment. 1993, pp 705-711, issn 0048-9697, SUP1Conference Paper