Quick Assessment of the Anomalies in Concrete Structure Using Dispersive Characteristic of Surface waveChia-Chi Cheng, Keng-Tsang Hsu, Chih-Hung Chiang, Fong-Jhang Ke and Hong-Hua WangMATEC Web Conf., 138 (2017) 03002DOI: https://doi.org/10.1051/matecconf/201713803002