References
- West , DM , Vermunt , JJ , Pomroy , WE and Bentall , HP . 1994 . Inefficiency of ivermectin against Cooperia spp. infection in cattle . New Zealand Veterinary Journal , 42 : 192 – 193 .
- Bisset , SA , Brunsdon , RV and Forbes , S . 1990 . Efficacy of a topical formulation of ivermectin against naturally acquired gastro-intestinal nematodes in weaner cattle . New Zealand Veterinary Journal , 38 : 4 – 6 .
- McKenna , PB . 1991 . Resistance to benzimidazole anthelmintics in cattle in New Zealand . New Zealand Veterinary Journal , 39 : 454 – 455 .
- Conder , GA , Thompson , DP and Johnson , SS . 1993 . Demonstration of co-resistance of Haemonchus contortus to ivermectin and moxidectin . Veterinary Record , 132 : 651 – 652 .
- Shoop , WL , Haines , HW , Michael , BF and Eary , CH . 1993 . Mutual resistance to avermectins and milbemycins: oral activity of ivermectin and moxidectin against ivermectin-resistant and susceptible nematodes . Veterinary Record , 133 : 445 – 447 .