Bacchetta, G., et al. “CEPHALARIA BIGAZZII (DIPSACACEAE), A NEW RELIC SPECIES OF THE CEPHALARIA SQUAMIFLORA GROUP FROM SARDINIA”. Edinburgh Journal of Botany, vol. 65, no. 1, Mar. 2008, pp. 145-5, https://doi.org/10.1017/S0960428608004964.