C. Wongsriphuek, Dugger, B. D., and Bartuszevige, A. M.,
“Dispersal of wetland plant seeds by mallards: Influence of gut passage on recovery, retention, and germination”,
Wetlands, vol. 28682361311933523191768231555711547609092237126546613104873951221561504251395, no. 2, pp. 290 - 299, 2008.