* [http://www.cucurbit.org/family.html Cucurbitaceae] in [http://www.cucurbit.org/family.html T.C. Andres (1995 onwards)].
* [http://delta-intkey.com/angio/www/cucurbit.htm Cucurbitaceae] in [http://delta-intkey.com/angio/ L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval.] http://delta-intkey.com