Taxon - Odkazy a literatura
Botanical Society of British Isles [http://www.bsbi.org.uk/], Botany Department, The Natural History Museum [jako Echium rosulatum Lange]Datum citace: 11. květen 2012
Kew Science - Plants of the World online 2024-05 [115871-1]
Kew Science - Plants of the World online [https://powo.science.kew.org], Facilitated by the Royal Botanic Gardens, Kew [jako Echium rosulatum Lange]
Datum citace: 1. únor 2025