1. CheungS.C., LiN.H. Chinese medicinal herbs of Hong Kong. 1st ed. Hong Kong: The Commercial Press (Hong Kong) Limited; 1999. Volume 2: p. 156–7.
2. CheungS.C., LiN.H. Chinese medicinal herbs of Hong Kong. 1st ed. Hong Kong: The Commercial Press (Hong Kong) Limited; 1999. Volume 3: p. 102–3.