Observations on the anatomy of reproductive organs and the pollinators of Viburnum macrocephalum f. keteleeri (Caprifoliaceae)
JIN Biao, LI Na, JIA Ni, ZHOU Wu-Zhong, WANG Li, SHANG Chih-Bei
J Syst Evol . 2007, (6): 753 -768 .  DOI: 10.1360/aps06018