For Elodea
Cook, C.D.K., and K. Urmi-König. 1985. A revision of the genus Elodea (Hydrocharitaceae). Aquatic Bot. 21: 111-156. Google Scholar
Cook. 1998. In Kubitzki, K., ed. 1998b. The families and genera of vascular plants. IV. Flowering plants – Monocotyledons – Alismatanae and Commelinanae (except Gramineae). Springer, Berlin. 511 pp. Google Scholar
Haynes, R.R. 2000c. Hydrocharitaceae. In Flora of North America Editorial Committee. 2000. Flora of North America north of Mexico. Volume 22, Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae. Oxford Univ. Press, New York, NY. 352 pp. Google Scholar