1. Lower Ordovician (Billingenian–Kunda) conodont zonation and provinces based on sections from Horns Udde, north Öland, Sweden;Bagnoli;Boll. Soc. Paleontol. Ital.,1997
2. Bentonite beds and discontinuity surfaces as correlative tools in the Lower to Middle Ordovician carbonates of Baltoscandia;Bagnoli;Palaeopelagos Spec. Publ. No. 2,1999
3. The Asaphus Limestone in northernmost Öland;Bohlin;Bull. Geol. Inst. Uppsala,1949
4. The Lower Ordovician limestone between the Ceratopyge Shale and the Platyurus Limestone of Böda Hamn;Bohlin;Bull. Geol. Inst. Uppsala,1955
5. Mikrofossilien aus dem Ordovizium des Baltikums1. Markasitschicht, Dictyonema-Schiefer, Glaukonitsand, Glaukonitkalk;Eisenack;Senckenbergiana Lethaea,1958