Heidbrink, Ingo. “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, vol. 33, no. 3-4, June 2024, pp. 562-4, doi:10.25071/2561-5467.1216.