Hasselmeier , I., K. F. Abt, D. Adelung, and U. Siebert. 2023. “Stranding Patterns of Harbour Porpoises (Phocoena Phocoena) in the German North and Baltic Seas: When Does the Birth Period Occur?”. J. Cetacean Res. Manage. 6 (3):259-63. https://doi.org/10.47536/jcrm.v6i3.768.