Gonçalves, A.C., Castro, S., Paiva, J., Santos, C. and Silveira, P. 2018.

Taxonomic revision of the genus Calendula (Asteraceae) in the Iberian Peninsula and the Balearic Islands

. Phytotaxa. 352, 1 (Jun. 2018), 1–91. DOI:https://doi.org/10.11646/phytotaxa.352.1.1.