Hoberg, E.P., Abrams, A., Ezenwa, V.O. 2008. An exploration of diversity among the Ostertagiinae: Africanastrongylus buceros GEN. NOV. ET SP. NOV. (Nematoda: Trichostrongyloidea) in African Buffalo (Syncerus caffer). Journal of Parasitology. 94:230-251.
Hoberg, E.P., Abrams, A. 2008. Hamulonema gen. nov. for ostertagia kenyensis and teladorsagia hamata in the ostertagiine fauna (nematoda: trichostrongyloidea) from african ungulates. Journal of Parasitology. 94:866-879.
Hoberg, E.P., Abrams, A. 2007. Emended description and redetermination of Sarwaria caballeroi n. comb. (Nematoda: Ostertaginae) with Details of the Synlophe and Esophageal Characters. Journal of Parasitology. 93:1140-1150.
Hoberg, E.P., Abrams, A. 2004. Pseudostertagia bullosa (Nematoda: Trichostrongyloidea) in artiodactyl hosts from North America: Redescription and comments on systematics. Journal of Parasitology. 91:370-381.