Trapped thickness-shear modes in a contoured, partially electroded AT-cut quartz resonator Junjie Shi, Cuiying Fan, Minghao Zhao and Jiashi Yang Eur. Phys. J. Appl. Phys., 69 1 (2015) 10302 Published online: 27 January 2015 DOI: 10.1051/epjap/2014140278