For Cynanchum
Endress, M.E., U. Meve, D.J. Middleton, and S. Liede-Schumann. 2018. Apocynaceae. In Kadereit, J., & V. Bittrich. 2018. The families and genera of flowering plants. XV. Flowering plants. Eudicots. Apiales, Gentianales (except Rubiaceae). Springer, Cham.
Krings, A. 2001. Neotypification of Enslenia albida and a new combination in Ampelamus for Cynanchum laeve (Apocynaceae). Sida 19: 925-929.
Liede, S. 1997a. Subtribes and genera of the tribe Asclepiadaceae (Apocynaceae, Asclepiadoideae) – a synopsis. Taxon 46: 233-247.
Liede, S. 1997b. American Cynanchum (Asclepiadaceae) – a preliminary infrageneric classification. Novon 7: 172-181.
Liede, S., and A. Täuber. 2002. Circumscription of the genus Cynanchum (Apocynaceae – Asclepiadoideae). Systematic Botany 27: 789-800.
Liede, S., and U. Meve. 1997. Some clarifications, new species, and new combinations in American Cynanchinae (Asclepiadaceae). Novon 7: 38-45.
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