Budimir, M.Damjanovic, D.Setter, N.2007-10-182007-10-182007-10-18200610.1103/PhysRevB.73.174106https://infoscience.epfl.ch/handle/20.500.14299/13085WOS:0002379502000368733Piezoelectric response and free-energy instability in the perovskite crystals BaTiO3, PbTiO3, and Pb(Zr,Ti)O-3text::journal::journal article::research article