López, E. and Devesa, J.A. 2010. Taxonomic notes on genus Centaurea (Asteraceae) in the Iberian Peninsula. Peninsula. C. paniculata, C. hanryi and C. diffusa. Anales del Jardín Botánico de Madrid. 67, 2 (Dec. 2010), 113–126. DOI:https://doi.org/10.3989/ajbm.2262.