SHOOP, Robert L. Stephen Roskill, The Secret Capture: U-110 and the Enigma Story (Robert L. Shoop). The Northern Mariner / Le marin du nord, [S. l.], v. 31, n. 4, p. 472–474, 2022. DOI: 10.25071/2561-5467.904. Disponível em: https://tnm.journals.yorku.ca/index.php/default/article/view/904. Acesso em: 23 nov. 2024.