Keith G Wardhaugh

How to test nontarget effects of veterinary pharmaceutical residues in livestock dung in the field

Jörg Römbke, John Jensen, Joost Lahr, 2011, Integrated environmental assessment and management.

Fecal residues of veterinary parasiticides: nontarget effects in the pasture environment.

Alistair B A Boxall, A. Boxall, K. Floate, 2005, Annual review of entomology.