- Daams, R. y Freudenthal, M. (1981). Aragonian: the Stage concept versus Neogene Mammal Zones. Scripta Geol., 62: 1-17.
- Daams, R. y Freudenthal, M. (1990). The Ramblian and the Aragonian: limits, subdivision, geographical and temporal extension. In: European Neogene Mammal Chronology (E. H. Lindsay, V. Fahlbusch y P. Mein, edit.) Plenum Press, N. Y.: 51-53.
- Daams, R., Freudenthal, M. y Weerd, A. van der (1977). Aragonian, a new stage for continental deposits of Miocene age. Newsl. Stratig., 6: 42-55
- Daams, R., Meulen, A. J. van der, Álvarez Sierra, M. A., Peláez-Campomanes, P. y Krijgsman, W. (1999b). Aragonian stratigraphy reconsidered, and a re-evaluation of the middle Miocene mammal biochronology in Europe. Earth Planet. Sci. Letters, 165: 287-2
- Daams, R., Meulen, A. J. van der, Álvarez Sierra, M. A., Peláez-Campomanes, P., Calvo, J. P., Alonso Zarza, M. A. y Krijgsman, W. (1999a). Stratigraphy and sedimentology of the Aragonian (Early to Middle Miocene) in its type area (North-Central Spain).