Prossl, K.F. y Grosser, J.R. 1994. Some new palynomorphs from the Silurian of the Quetame Massif, Cordillera Oriental, Colombia, South America. Boletín Geológico. 34, 2-3 (jul. 1994), 28–38. DOI:https://doi.org/10.32685/0120-1425/bolgeol34.2-3.1994.357.