C.M. Melgoza Villagomez, H. Silos Espino, A. Nava Cedillo, L.L. Valera Montero, C. Perales Segovia, C.A. Martinez Guerra, G. Martinez Guerra, A. Cruz Hernandez and O. Paredes Lopez
International Journal of Botany 5 ( 2 ): 160 - 165 , 2009