Galán de Mera, A. and Vicente Orellana, J.A. 1998. Hypochaeris angustifolia (Asteraceae): distribution, ecology and phytosociology. Acta Botanica Malacitana. 23, (Dec. 1998), 247–252. DOI:https://doi.org/10.24310/abm.v23i0.8573.