Scholz, G.; Pohl, I.; Seiler, A.; Bremer, S.; Brown, N. A.; Piersma, A. H.; Holzhütter, H. G.; Spielmann, H. [Results of the First Phase of the ECVAM Project "Prevalidation and Validation of Three in Vitro Embryotoxicity tests"] [Article in German]. ALTEX 1998, 15, 3-8.