Galán de Mera, A. and Gómez Carrión, J. 2001. The cactus communities in Southern Peru. New data on Corryocaction brevistyli alliance. Acta Botanica Malacitana. 26, (Dec. 2001), 240–246. DOI:https://doi.org/10.24310/abm.v26i0.7426.