@ARTICLE{5864203, author = {Ovejas, V.J. and Cuadras, A.} , journal = {Smart materials and structures} , year = {2011} , month = {Aug} , volume = {20} , number = {8} , pages = {085030} , doi = {10.1088/0964-1726/20/8/085030} , url = {http://iopscience.iop.org/0964-1726/20/8/085030/pdf/0964-1726_20_8_085030.pdf} , title = {Multimodal piezoelectric wind energy harvesters} }