@incollection{Wu12, author = {Ying Wu and Yun Lai and Zhao-Qing Zhang}, title = {Effective Medium Theories and Symmetry Properties of Elastic Metamaterials}, booktitle = {Metamaterial}, publisher = {IntechOpen}, address = {Rijeka}, year = {2012}, editor = {Xun-Ya Jiang}, chapter = {6}, doi = {10.5772/36554}, url = {https://doi.org/10.5772/36554} }