1. Botanical nomenclature, Shanghai, 1917;1004.
2. Lock M. East Asian medicine in urban Japan: varieties of medical experience. University of California Press; Reprint edition 1984. ISBN 0-520-05231-5.
3. Nagai N, Pharm Z 1887;xxxii: 700.
4. Späth E, Gökring R, Monatsh F. Chemistry. 1920;xli:319.
5. Chen K, Schmidt CF. J Pharmacol Exp Ther. 1924;xxiv:339.