TY - JOUR AU - Collado, Juan AU - Rocas, Eduard AU - Mateu, Jordi AU - Orloff, Nathan AU - Booth, James AU - Padillo, Alberto AU - Callaghan, Juan 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 -