Cedro, B. et al. 2024. The Szczecin spherules and irregular lime-ferrous concretions from the collections of the Geological Museum of the University of Szczecin and their significance for the reconstruction of sedimentation conditions in the Oligocene sea of ​​the Szczecin area – preliminary results. Acta Universitatis Lodziensis. Folia Geographica Physica. 23 (Nov. 2024), 19–26. DOI:https://doi.org/10.18778/1427-9711.23.02.