double bubble pressure hull - SERP Analysis

https://aviation.stackexchange.com/questions/82659/what-are-the-advantages-and-disadvantages-of-a-double-bubble-fuselage

https://www.reddit.com/r/submarines/comments/14w2kp2/could_a_pressured_double_hull_work/

https://maritime.org/tech/descon.php

https://www.quora.com/How-does-the-double-hull-design-with-water-in-between-improve-the-submarine-noise-level

https://aviation.stackexchange.com/questions/64787/why-don-t-double-bubble-fuselages-cause-severe-fatigue-problems

https://www.sciencedirect.com/science/article/abs/pii/S0022509617306622

https://www.mdpi.com/2077-1312/12/11/1949

https://www.researchgate.net/publication/376231346_Protection_Mechanism_of_Underwater_Double-Hull_Coated_with_Polyurea_and_UHMW-PE_Subjected_to_Shock_Waves_and_Bubble_Loads

https://www.quora.com/Why-are-Russian-subs-using-double-hull-principle-while-none-of-American-ones-do-Its-been-known-since-WWI-and-considered-a-major-advantage-in-Russia-and-for-a-layman-indeed-looks-so-but-for-some-reason-was-never