Coba jelasin Artikel dari Rhododendron dong

Walter Magor. A History of Rhododendrons. JARS Volume 44, Number 4, Fall 1990

GAO Lian-Ming, LI De-Zhu, ZHANG Chang-Qin, YANG Jun-Bo. Infrageneric and Sectional Relationships in the Genus Rhododendron (Ericaceae) Inferred from ITS Sequence Data. Am Botanica Sinica 2002, 44(11) 1351-1356