ZIMMERMAN, David. Paul Langevin and the Discovery of Active Sonar or Asdic. The Northern Mariner / Le marin du nord, [S. l.], v. 12, n. 1, p. 39–52, 2002. DOI: 10.25071/2561-5467.572. Disponível em: https://tnm.journals.yorku.ca/index.php/default/article/view/572. Acesso em: 4 dec. 2024.