Rhymer, Judith M. (2006): Extinction by hybridization and introgression in anatine ducks. Acta Zoologica Sinica52(Supplement): 583–585. PDF fulltextArkiverad 3 december 2013 hämtat från the Wayback Machine.
Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2018) The eBird/Clements checklist of birds of the world: Version 2018 http://www.birds.cornell.edu/clementschecklist/download, läst 2018-08-11
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Mank, Judith E.; Carlson, John E. & Brittingham, Margaret C. (2004): A century of hybridization: Decreasing genetic distance between American black ducks and mallards. Conservation Genetics5(3): 395–403. doi:10.1023/B:COGE.0000031139.55389.b1 (HTML sammanfattning)
Kirby, Ronald E.; Sargeant, Glen A. & Shutler, Dave (2004): Haldane's rule and American black duck × mallard hybridization. Canadian Journal of Zoology82(11): 1827–1831. doi:10.1139/z04-169 (HTML sammanfattning)
Rhymer, Judith M. & Simberloff, Daniel (1996): Extinction by hybridization and introgression. Annu. Rev. Ecol. Syst.27: 83-109. doi:10.1146/annurev.ecolsys.27.1.83 (HTML sammanfattning)
Rhymer, Judith M. (2006): Extinction by hybridization and introgression in anatine ducks. Acta Zoologica Sinica52(Supplement): 583–585. PDF fulltextArkiverad 3 december 2013 hämtat från the Wayback Machine.