Geology and geochronology of the Estonian Precambrian basementNirgi, Siim; Soesoo, AlvarXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 29 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/5581dda4-94fa-4bcb-b1e7-8120d96af50b.pdf

The crystalline basement of Estonia: rock complexes of the Paleoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian Periods, and regional correlationsPuura, Väino; Kirs, Juho; Klein, Vello; Konsa, Mare; Koppelmaa, Heino; Niin, Mati; Soesoo, Alvar; Urtson, KristjanThe Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 55