Studying the water regime of the Baltic Oil Shale Basin with the new Virumaa groundwater flow modelPolikarpus, Maile; Pärn, JoonasYearbook 2018 / Geological Survey of Estonia2019 / p. 35-36 : ill., map https://www.egt.ee/sites/default/files/content-editors/aastaraamat/egt_aastaraamat_eng_web.pdf https://www.ester.ee/record=b5231713*est