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