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63卷 (1977) >> 119页 PDF >> 倒吊笔属 Wrightia；http://www.iplant.cn/info/Wrightia?t=z
• FOC Vol. 16 Page 174；29. Wrightia R. Brown, Mem. Wern. Nat. Hist. Soc. 1: 73. 1811.；倒吊笔属；http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=134988

• Pichon, Not. syst. (Paris) 14: 77-91 1951；https://www.biodiversitylibrary.org/page/8067520#page/85/mode/1up

Pichon, Michel；Classification des Apocynacées: XIII, Genre Wrightia et genres voisins

• Ngan, Ann. Missouri Bot. Gard. 52: 114-175 1965；https://www.biodiversitylibrary.org/page/20102936#page/125/mode/1up

Ngan, Phung Trung；A revision of the genus Wrightia (Apocynaceae) ,

• Hook, Fl. Brit. India [J. D. Hooker] 3(9): 653 (1882).；https://www.biodiversitylibrary.org/page/456249#page/657/mode/1up
• Ridley, J. Asiat. Soc. Bengal 58: 27 1911；https://www.biodiversitylibrary.org/page/41826517#page/315/mode/1up

Ridley, Henry Nicholas；An account of a Botanical Expedition to Lower Siam

Part II

• Keng, Gard. Bull. Singapore 36: 117 1983；https://www.biodiversitylibrary.org/page/43650106#page/131/mode/1up
• Gagnep. in Fl. Gen. Indo-Chine 3: 1183 (1922)；https://www.biodiversitylibrary.org/page/27563600#page/1186/mode/1up
• King & Gamble, J. Asiat. Soc. Bengal 74 2: 467 (1908).；https://www.biodiversitylibrary.org/page/33790909#page/483/mode/1up