1. Ordovician (Arenigian) Acritarchs from the Solanas Sandstone Formation, Central Sardinia, Italy;Albani;Boll. Soc. Paleontol. Ital.,1989
2. Lower Ordovician (Billingenian–Kunda) conodont zonation and provinces based on sections from Horns Udde, north Öland, Sweden;Bagnoli;Boll. Soc. Paleontol. Ital.,1997
3. Acritarchs and conodonts from the Cambro-Ordovician Furuhäll (Köpingsklint) section (Öland, Sweden);Bagnoli;Riv. Ital. Paleontol. Stratigr.,1988
4. Bidrag til cilioflagellaternes naturhistorie. Forelobige meddelelser;Bergh;Dan. Nat.hist.foren. Kjobenhavn Vidensk. Medd.,1881
5. The Asaphus Limestone in northermost Öland;Bohlin;Bull. Geol. Inst. Uppsala,1949