Wiklund, Annette. «A study of the morphological variability in Cynara humilis L. and C. Hystrix BalI (Aseraceae-Cardueae)». Lazaroa 11 (janeiro 1, 1989): 19. Acedido julho 29, 2026. https://revistas.ucm.es/index.php/LAZA/article/view/LAZA8989110019A.