J. - P.  Lumaret, Galante, E., Lumbreras, C., Mena, J., Bertrand, M., Bernal, J. L., Cooper, J. F., Kadiri, N., and Crowe, D., ?Field effects of ivermectin residues on dung beetles?, Journal of Applied Ecology, vol. 30, pp. 428-436, 1993.