Blanco-Dios, Jaime B. 2007. “Morphometric Study of a Hybrid Zone Between Armeria Beirana and A. Pubigera (Plumbaginaceae) in the Northwest of the Iberian Peninsula”. Anales Del Jardín Botánico De Madrid 64 (2):229-35. https://doi.org/10.3989/ajbm.2007.v64.i2.180.