Yalamov, D., Georgiev, P. and Garbatov, Y. 2023. Retrofitting measure of an ageing multi-purpose ship exposed to short-sea LNG operation. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA. 7, 1 (Jun. 2023), 68-87. DOI:https://doi.org/10.29114/ajtuv.vol7.iss1.293.