Petroleum source rock evaluation of the Alum and Dictyonema Shales (Upper Cambrian-Lower Ordovician) in the Baltic Basin and Podlasie Depression (eastern Poland)Kosakowski, Pawel; Kotarba, Maciej J.; Piestrzynski, Adam; Šogenova, Alla; Wieclaw, DariuszInternational journal of earth sciences2017 / p. 743-761 : ill https://doi.org/10.1007/s00531-016-1328-x