LEME, E. M. C., S. HELLER, G. ZIZKA, and H. HALBRITTER. “New Circumscription of <em>Cryptanthus</em> And New Cryptanthoid Genera and Subgenera  (Bromeliaceae: Bromelioideae) Based on Neglected Morphological Traits and Molecular Phylogeny”. Phytotaxa, vol. 318, no. 1, Aug. 2017, pp. 1–88, doi:10.11646/phytotaxa.318.1.1.