1. Ashri, A., 1957. Cytogenetics and morphology of Carthamus L. species and hybrids. Ph. D. Dissert. University of Calif., Davis., USA. pp. 186.
2. Ashri, A. & P. F. Knowles, 1960. Cytogenetics of safflower (Carthamus L.) species and their hybrids. Agron. J. 52: 11–17.
3. Ashri, A. & Y. Rudich, 1965. Unequal reciprocal natural hybridization rates between two Carthamus L. species. Crop Sci. 5: 190–191.
4. Deshpande, R. B., 1952. Wild safflower (Carthamus oxyacantha
Bieb.)-a possible oilseed crop for the desert and arid regions. Indian J. Genet. Plant Breeding 12: 10–13.
5. Hanelt, P., 1963. Monographische Übersicht der Gattung Carthamus L. (Compositae). Feddes Repertorium 67: 41–180.