González-Mancera, G., Reyes-Santiago, P.J., de la Cruz-López, L.E., Islas-Luna, M.A., Sánchez-Sauza, M.A., Flores-García, M.A. and Vergara-Silva, F. 2018. Palynology of Twenty One Species of Echeveria Genus (Crassulaceae) from Mexico – High Resolution Study. Acta Microscopica. 27, 1 (Jun. 2018), 53-62.