Frohlich, M. W., Thulin, M., & Chase, M. W. (2020).

Ninety-three new combinations in Euploca for species of Heliotropium section Orthostachys (Boraginaceae sensu APG)

. Phytotaxa, 434(1), 13–21. https://doi.org/10.11646/phytotaxa.434.1.2