Fedynich, A. M., D. B. Pence, and J. F. Bergan. 1997. Helminth community structure and pattern in sympatric populations of double-crested and neotropic cormorants. Journal of the Helminthological Society of Washington 64: 176–182.
Kinsella, J. M., and D. J. Forrester. 1999. Parasitic helminths of the common loon, Gavia immer, on its wintering grounds in Florida. Journal of the Helminthological Society of Washington 66: 1–6.
Schmidt, G. D. 1975a. Andracantha, a new genus of Acanthocephala (Polymorphidae) from fish-eating birds, with descriptions of three species. Journal of Parasitology 61: 615–620.
Added keyword "parasitic"
Salgado-Maldonado, G. and O. M. Amin. 2009. Acanthocephala of the Gulf of Mexico, Pp. 539–552 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
Harte Research Institute for Gulf of Mexico Studies. 2016. GulfBase: Resource Database for Gulf of Mexico Research, Education, and Management. Texas A&M University-Corpus Christi. World Wide Web electronic publication. http://www.gulfbase.org, 06-02-2020.