; Harrigan, R.J.; Rohwer, S.; Sorenson, Michael D.; Winker, K.; Zhuravlev, Yury N. & McCracken, Kevin G. (2005): "Phylogeography of the Mallard" ("Anas platyrhynchos"): "Hybridization, dispersal, and lineage sorting contribute to complex geographic structure".
; Harrigan, R.J.; Rohwer, S.; Sorenson, Michael D.; Winker, K.; Zhuravlev, Yury N. & McCracken, Kevin G. (2005): "Phylogeography of the Mallard" ("Anas platyrhynchos"): "Hybridization, dispersal, and lineage sorting contribute to complex geographic structure".