Skóra, Krzysztof E, and Iwona Kuklik. “Bycatch as a potential threat to harbour porpoises (<i>Phocoena phocoena</i>) in Polish Baltic waters”. NAMMCO Scientific Publications 5 (July 1, 2003): 303–315. Accessed January 8, 2025. https://new.eludamos.org/index.php/NAMMCOSP/article/view/2831.