1. Martinez, M. 1959.Las Plantas Medicinais de Mexico. 4th Edn., 90Mexico: Ediciones Botas. p
2. Shreve, F. and Wiggins, I. 1964.Vegetation and Flora of the Sonora Desert, Vol. i, 733Stanford: Stanford Univ. Press. p
3. Simpson, B. B. 1989.Flora Neotrópica, Vol. 49, 85New York: The New York Botanical Garden.
4. Lignans neolignans and norneolignans from krameria cystisoides
5. Lignans fromKrameria ixina