FERRER-GALLEGO, P. P., Roselló, R., Laguna, E., Gómez, J., & Peris, J. B. (2014). Typification of two Linnaean names: Centaurea aspera and Centaurea isnardii (Asteraceae). Phytotaxa, 183(2), 114–118. https://doi.org/10.11646/phytotaxa.183.2.4