L. G. Rickard, Hoberg, E. P., Mulrooney, D. M., and Zimmerman, G. L.,
“Isoelectric focusing of soluble proteins in the characterization of species and isolates of Nematodirus (Nematoda: Trichostrongyloidea).”,
The Journal of parasitology, vol. 83, no. 5, pp. 895-901, 1997.