Juuti, Jari A Manufacturing of prestressed piezoelectric unimorphs using a postfired biasing layer. [electronic resource] - IEEE transactions on ultrasonics, ferroelectrics, and frequency control May 2006 - 838-46 p. digital Publication Type: Journal Article ISSN: 0885-3010 Standard No.: 10.1109/tuffc.2006.1632674 doi