ZAVADIL, T. SELECTION OF REFERENCE VALUE OF LONGITUDINAL TO TRANSVERSAL ULTRASONIC WAVES VELOCITY RATIO ON PRESSURE PURPOSE STEELS FOR DETECTION OF CREEP. Acta Polytechnica CTU Proceedings, [S. l.], v. 19, p. 46–52, 2018. DOI: 10.14311/APP.2018.19.0046. Disponível em: https://ojs.cvut.cz/ojs/index.php/APP/article/view/5233. Acesso em: 4 may. 2024.