Sánchez del-Pino, Ivonne, Thomas Borsch, et Timothy J. Motle. 2009. trnL-F and rpl16 Sequence Data and Dense Taxon Sampling Reveal Monophyly of Unilocular Anthered Gomphrenoideae (Amaranthaceae) and an Improved Picture of Their Internal Relationships. Systematic Botany 34(1):57-67.