TY - JOUR AU - Juan Collado AU - Eduard Rocas AU - Jordi Mateu AU - Nathan Orloff AU - James Booth AU - Alberto Padillo AU - Juan Callaghan C2 - IEEE Transactions on Microwave Theory and Techniques DA - 2011-05-01 LA - en M1 - 59 PB - IEEE Transactions on Microwave Theory and Techniques PY - 2011 TI - Characterization of the First Order Nonlinear Stiffened Elasticity of the Piezoelectric Layer in Bulk Acoustic Wave Resonators ER -