Ma’arif F, Widodo S, Nugroho MS, Tafrikan M, Gao Z. The Ultrasonic Pulse Velocity and Lagrangian Approaches to Predict the Effective Thickness and Homogeneity of the Sandwich Panel. U Karst [Internet]. 2022 Nov. 30 [cited 2024 Nov. 29];6(2):246-60. Available from: https://ojs.unik-kediri.ac.id/index.php/ukarst/article/view/3545