- Newspaper: https://www.theguardian.com/us-news/2016/jul/16/us-navy-banned-from-using-sonar-that-harms-dolphins-and-walruses
- Podcast: https://www.npr.org/2018/09/19/649432685/whales-and-navy-sonar
- Film: https://videolab.avnet.kuleuven.be/video/?id=3a25e76f7608ee54b783818144544dc8&height=390&width=640&autoplay=false
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