Heidbrink, I. 2024. Alessio Sgarlato and Nico Sgarlato, Secret Projects of the Kriegsmarine. Unseen Designs of Nazi Germany’s Navy by Ingo Heidbrink. The Northern Mariner / Le marin du nord. 33, 3-4 (Jun. 2024), 562–564. DOI:https://doi.org/10.25071/2561-5467.1216.