山羊百科，林文智老師的植物、山岳、攝影紀錄

Part I

• 《中国植物志》 第57(1)卷 (1999) >> 004页 PDF >> 杜香属 Ledum；http://www.iplant.cn/info/Ledum?t=z
• FOC Vol. 14 Page 259；11. Ledum Linnaeus, Sp. Pl. 1: 391. 1753.；杜香属；http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=117842

Part II

Part III

• Harmaja, Harri 1991 Taxonomic notes on Rhododendron subsection Ledum (Ledum, Ericaceae), with a key to its species Ann. Bot. Fenn. 28: 171-173
• Harmaja, Harri 1998 Rhododendron diversipilosum, comb. nov. (Ericaceae) Ann. Bot Fennici 35: 263–264.

• Kron, K. A. & W. S. Judd 1990 Phylogenetic relationships within the Rhodoreae (Ericaceae) with specific comments on the placement of Ledum Syst. Bot. 15: 57–68.
• Kron, Kathleen A. 1997 Phylogenetic relationships of Rhododendroideae (Ericaceae) Amer. J. Bot. 84: 973-980
• Hart, Andrew, Kathleen Kron & Emily Gillespie 2017 Molecular phylogenetic analysis of the north-temperate Labrador Teas (Ericaceae: Rhododendron Subsect. Ledum) suggests a complex genetic history Journal of the Botanical Research Institute of Texas 11: 53-65