1. The error of determination of toxicity;Trevan,1927
2. Specifications for calculating the median effective dose;Weil;Am. Ind. Hyg. Assoc. Q.,1953
3. Significance of the LD50-test for the toxicological evaluation of chemical stubstances;Zbinden;Arch. Toxicol.,1981
4. Retrospective study on the reliability of an ‘approximate LD50’ determined with a small number of animals;Muller;Arch. Toxicol.,1982
5. A new approach to minimizing the number of animals used in acute toxicity testing and optimizing the information of test results;Schutz;Arch. Toxicol.,1982