Bogdanović, S., Brullo, C., Brullo, S., Cambria, S., & Giusso Del Galdo, G. (2020).

Psoralea bituminosa var. atropurpurea (Psoraleeae, Fabaceae) from Morocco recognised as a distinct species in Bituminaria

. Phytotaxa, 451(3), 195–205. https://doi.org/10.11646/phytotaxa.451.3.2