1.Hershkovitz, M.A. 1993: Revised circumscriptions and subgeneric taxonomies of Calandrinia and Montiopsis (Portulacaceae) with notes on phylogeny of the Portulacaceous alliance. – Annals of the Missouri Botanical Garden 80(2): 333-365
2.Hershkovitz, M.A. 1993: Revised circumscriptions and subgeneric taxonomies of Calandrinia and Montiopsis (Portulacaceae) with notes on phylogeny of the Portulacaceous alliance. – Annals of the Missouri Botanical Garden 80(2): 333-365