R. E. Robles-Zepeda, M. Jiménez-Estrada, A. Navarro-Ocana, I. Saad-Villegas, I. Brunner, E. Ruiz-Bustos
"Secondary metabolites induction in Mammillaria huitzilopochtli (Cactaceae) and evaluation of the fungicidal activity"
African Journal of Biotechnology Vol. 8 (16), pp. 3874-3878, 18 August, 2009
http://www.academicjournals.org/AJB/PDF/pdf2009/18Aug/Robles-Zepeda%20et%20al.pdf