Hernandez-Ruiz, J.; Herrera-Cabrera, B. E.; Delgado-Alvarado, A.; Salazar-Rojas, V. M.; Bustamante-Gonzalez, Ángel; Campos-Contreras, J. E.; Ramírez-Juarez, J. Potential Distribution and Geographic Characteristics of Wild Populations of Vanilla Planifolia (Orchidaceae) Oaxaca, Mexico. Rev. Biol. Trop. 2016, 64, 235–246.