Ivanov, Emilian, and Costel Ungureanu. “Design of a Submarine Main Ballast Blowing Systems”. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding 46 (December 4, 2023): 147-154. Accessed May 13, 2024. https://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/6307.