Fleming WJ (1981)
Recovery of brain and plasma cholinesterase activities in ducklings exposed to organophosphorus pesticides
Archives of Environmental Contamination & Toxicology 10: 215

Baker JA, Jordaan JO, Robertson WD (1979)
Ixodicidal resistance in Boophilus microplus (Canestrini) in the Republic of South Africa and Transkei
J S Afr Vet Assoc 50: 296

Obersteiner EJ, Sharma RP (1978)
Evaluation of cytotoxic responses caused by selected organophosphorus esters in chick sympathetic ganglia cultures
Can J Comp Med 42: 80