[1]
Gutiérrez-Ortega, J.S., Jiménez-Cedillo, K., Pérez-Farrera, M.A., Martínez, J.F., Molina-Freaner, F., Watano, Y. and Kajita, T. 2018.

Species definition of Dioon sonorense (Zamiaceae, Cycadales), and description of D. vovidesii, a new cycad species from northwestern Mexico 

. Phytotaxa. 369, 2 (Sep. 2018), 107–114. DOI:https://doi.org/10.11646/phytotaxa.369.2.4.