Averyanov, L. V., Nguyen, K. S. and Nguyen, H. T. (2014) “Checklist of mycoheterotrophic species of the genus <em>Exacum</em> (Gentianaceae) and new species, <em>E. zigomorpha</em>, from northern Vietnam”, Phytotaxa, 183(2), pp. 108–113. doi: 10.11646/phytotaxa.183.2.3.