Thomas, R. S., Paules, R. S., Simeonov, A., Fitzpatrick, S. C., Crofton, K. M., Casey, W. M. and Mendrick, D. L. (2018) “The US Federal Tox21 Program: A strategic and operational plan for continued leadership”, ALTEX - Alternatives to animal experimentation, 35(2), pp. 163-168. doi: 10.14573/altex.1803011.