Taxon - Odkazy a literatura
IUCN Red List of Threatened Species 2024-1 [125898647]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [jako Exacum tetragonum Roxb.]
Datum citace: 29. leden 2024
Kew Science - Plants of the World online 2024-05 [77330271-1]
Kew Science - Plants of the World online [https://powo.science.kew.org], Facilitated by the Royal Botanic Gardens, Kew [jako Exacum tetragonum Roxb.]
Datum citace: 1. únor 2025