• The late Sandbian/Early Katian carbonate succession in the eastern St.Petersburgregion: the stratigraphic record in the Krapivno The late Sandbian/Early Katian carbonate succession in the eastern St. Petersburg region: the stratigraphic record in the Krapivno 21 drill core 21 drill coreHints, Linda; Lehnert, Oliver; Nõlvak, Jaak; Männik, Peep; Pärnaste, Helje; Joachimski, Michael M.XI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 13 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/16c906be-0636-4d30-95fe-065c76cc887a.pdf