^Sukumaran, Swapna Thacheril; Sugathan, Shiburaj; Abdulhameed, Sabu (28 November 2020). Plant Metabolites: Methods, Applications and Prospects. Springer Nature. p. 279. ISBN978-981-15-5136-9.
^Frank, Robert L.; Cohen, S. Mark; Coker, James N. (October 1950). "The Structures and Syntheses of Rhizocarpic Acid and Epanorin". Journal of the American Chemical Society. 72 (10): 4454–4457. doi:10.1021/ja01166a032. S2CID102011505.
^Studies in Natural Products Chemistry. Newnes. 15 March 2013. p. 361. ISBN978-0-444-62609-7.