Wiklund, Annette. 1989. A study of the morphological variability in Cynara humilis L. and C. Hystrix BalI (Aseraceae-Cardueae). Lazaroa 11, 19. Obtido 6 de Dezembro de 2025 de https://revistas.ucm.es/index.php/LAZA/article/view/LAZA8989110019A