Edgar, J. A.; Cockrum, P. A.; Frahn, J. L. (1976-12-01). "Pyrrolizidine alkaloids inDanaus plexippus L. andDanaus chrysippus L.". Experientia. 32 (12): 1535–1537. doi:10.1007/bf01924437. ISSN0014-4754. S2CID27664625.
Dobler, S., Dalla, S., Wagschal, V., & Agrawal, A. A. (2012). Community-wide convergent evolution in insect adaptation to toxic cardenolides by substitutions in the Na,K-ATPase. Proceedings of the National Academy of Sciences, 109(32), 13040–13045. https://doi.org/10.1073/pnas.1202111109
Edgar, J. A.; Cockrum, P. A.; Frahn, J. L. (1976-12-01). "Pyrrolizidine alkaloids inDanaus plexippus L. andDanaus chrysippus L.". Experientia. 32 (12): 1535–1537. doi:10.1007/bf01924437. ISSN0014-4754. S2CID27664625.
Edgar, J. A.; Cockrum, P. A.; Frahn, J. L. (1976-12-01). "Pyrrolizidine alkaloids inDanaus plexippus L. andDanaus chrysippus L.". Experientia. 32 (12): 1535–1537. doi:10.1007/bf01924437. ISSN0014-4754. S2CID27664625.