Verbatim text: Cook, C. D. K. and K. Urmi-König. 1985. A revision of the genus Elodea (Hydrocharitaceae). Aquatic Bot. 21: 111--156. St.
Author: Cook, C.D.K., Urmi-K&ouml, K., nig,
Year: 1985
Title: A revision of the genus Elodea (Hydrocharitaceae)
Journal: Aquatic Bot
Volume: 21
Pages: 111–156