Johnson, Sylvester. 1965. «Observations on the Systematic Position of the Genus <i>Gaigeria</i> Railliet & Henry, 1910 (subfamily Necatorinae Lane, 1907: Family Ancylostomidae Lane, 1907: Nematoda)». Revista De Biología Tropical 13 (2):213–217. https://doi.org/10.15517/rev.biol.trop.1965.28636.