Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from BalticaNdiaye, Mawo; Liiv, Merlin; Kallaste, Toivo; Graul, Sophie Jane Marie-Pascale Huguette; Hints, RuttEstonian journal of earth sciences2023 / p. 78-81 : ill https://doi.org/10.3176/earth.2023.25 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS