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

×Polascontria (Cactaceae), a Nothogenus That Represents the Gene Flow Between Escontria and Polaskia

. Phytotaxa 2017, 295, 141–158.