shivakoti, deepika . . and VINOD, K. G. . . (2020) “Experimental and theoretical studies of sandwich beams made of steel, concrete, and steel have shown interesting results”., The journal of contemporary issues in business and government, 26(3), pp. 20–27. Available at: http://www.cibgp.com/index.php/1323-6903/article/view/508 (Accessed: 31 October 2025).