Cruz-Zamora, Y., Cruz-García, F., Orozco-Arroyo, G., Reyes-Santiago, J., Martínez-Castilla, L. P., Wegier, A., & Vázquez-Santana, S. (2017).

×Polascontria (Cactaceae), a nothogenus that represents the gene flow between Escontria and Polaskia

. Phytotaxa, 295(2), 141–158. https://doi.org/10.11646/phytotaxa.295.2.3