- A noteworthy cycad, Ceratozamia hofmannii Ettingshausen 1887, from the Lower Miocene of Austria re-examined2004 | Faculty of Science
- New fossil records of Ceratozamia (Zamiaceae, Cycadales) from the European Oligocene and lower Miocene2014 | Faculty of Science
- A new tertiary Ceratozamia (Zamiaceae, Cycadopsida) from the European oligocene2002 | Faculty of Science
