Szelążek J, Gutkiewicz P, Mackiewicz S. Ultrasonic testing of stresses with longitudinal wave – experimental application to evaluate truss bridge. Roads and Bridges - Drogi i Mosty [Internet]. 2011 Apr. 1 [cited 2024 Jul. 22];10(1-2):121-40. Available from: https://rabdim.pl/index.php/rb/article/view/v10n1-2p121