P. J.  James and Moon, R. D., ?Pruritis and dermal response to insect antigens in sheep infested with Bovicola ovis?, International journal for parasitology, vol. 28, no. 3, pp. 419 - 427, 1998.

P. J.  James, ?Do sheep regulate the size of their mallophagan louse populations??, International journal for parasitology, vol. 29, no. 6, pp. 869 - 875, 1999.