Cambrian hyoliths of the Příbram-Jince Basin (Barrandian area, the Czech Republic): A review of recorded taxa Oldřich Fatka , Martin Valent 2019 | volume 75 | issue 1 | pages 128–140 PDF
Pauxillites thaddei a new lower Ordovician hyolith from Morocco Martin Valent , Joan Carbacho 2015 | volume 71 | issue 1-2 | pages 51–54 PDF