Distribution of Ordovician conodontsViira, Viive; Löfgren, Anita; Sjöstrand, LisaEstonian geological sections / Geological Survey of Estonia2006 / p. 11-13

Lower and Middle Ordovician conodonts from south-eastern Estonia and adjacent Pskov region of RussiaViira, Viive; Löfgren, AnitaThe Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 73