The type specimen of Debeya (Dewalquea) haldemiana rediscovered Adam Halamski , Jiří Kvaček 2013 | volume 69 | issue 1-2 | pages 83–86 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