1. Holdren, J. P.; Lander, E.Report to the President on Combating Antibiotic Resistance, PCAST, 2014.https://www.whitehouse.gov/sites/default/files/microsites/ostp/PCAST/pcast_amr_sept2014_final.pdf.
2. Natural Products As Sources of New Drugs over the 30 Years from 1981 to 2010
3. Barneby, R. C.Memoirs of The New York Botanical Garden; Bronx, New York, 1977; Vol.27, pp31–43.
4. Train, P.; Archer, W. A.; Henrichs, J. R.; Lawrence, M. A.Medicinal Uses of Plants by Indian Tribes of Nevada;Quarterman Pubns:Lawrence, MA, 1982; Vol.1, pp42–47.
5. Plant Antimutagenic Agents, 5. Isolation and Structure of Two New Isoflavones, Fremontin and Fremontone from Psorothamnus fremontii