Revision of Cenomanian flora from the Maletín Sandstone Josef Greguš , Jiří Kvaček 2015 | volume 71 | issue 3-4 | pages 315–364 PDF
Revision of Protopteris and Oncopteris tree fern stem casts from the Late Cretaceous of Central Europe Josef Greguš , Jiří Kvaček , Adam Halamski 2013 | volume 69 | issue 1-2 | pages 69–82 PDF
