A. M. Cauwet-Marc and P. Sunding, “Bupleurum salicifolium R. Brown in Buch de l’archipel Macaronésien: Taxonomie et Evolution”, Lazaroa, vol. 3, pp. 121–130, Jan. 1981, Accessed: Dec. 06, 2025. Available: https://revistas.ucm.es/index.php/LAZA/article/view/LAZA8181110121A