Abderhalden, Emil (29 July 2013). Gerbstoffe, Flechtenstoffe, Saponine, Bitterstoffe, Terpene, Ätherische Öle, Harze, Kautschuk (in German). Springer-Verlag. p. 56. ISBN 978-3-642-51316-9. Ejiri, Hiroko (1974). "Zeorin from the Mycobiont of Anaptychia Hypoleuca". Phytochemistry. 13 (12): 2871. Bibcode:1974PChem..13.2871E. doi:10.1016/0031-9422(74)80260-8. Zopf, Wilhelm (18 May 2017). Die Flechtenstoffe (in German). BoD – Books on Demand. p. 55. ISBN 978-9925-0-7804-2. Huneck, Siegfried (March 1961). "Zur Struktur von Zeorin und Leucotylin". Chemische Berichte. 94 (3): 614–622. doi:10.1002/cber.19610940307. Barton, D. H. R.; Mayo, P. de; Orr, J. C. (1 January 1958). "454. Triterpenoids. Part XXIV. Further investigations on the constitution of zeorin". Journal of the Chemical Society (Resumed): 2239–2248. doi:10.1039/JR9580002239. ISSN 0368-1769.