Martínez-González, C., Alcántara, O., Luna-Vega, I., & Garcia-Sandoval, R. (2015).

Phylogenetic placement and new data on macro and micro morphology of Nopalxochia phyllanthoides (Cactaceae), an endangered species from Mexico

. Phytotaxa, 222(4), 241–250. https://doi.org/10.11646/phytotaxa.222.4.1