Skóra, Krzysztof E, and Iwona Kuklik. “Bycatch as a potential threat to harbour porpoises (Phocoena phocoena) in Polish Baltic waters”. NAMMCO Scientific Publications 5 (July 1, 2003): 303–315. Accessed May 2, 2026. https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2831.