Liu Z-R, Wu J, Duan W.
Electronic-structure theory of crystalline insulators under a homogeneous electric field. Physical Review B - Condensed Matter and Materials Physics. 2004;(8):851171-851177.
Wu Z, Huang N, Liu Z, Wu J, Duan W, Gu B-L, Zhang X-W.
Ferroelectricity in Pb(Zr0.5Ti0.5)O3 thin films: Critical thickness and 180° stripe domains. Physical Review B - Condensed Matter and Materials Physics. 2004;(10):104108-1-104108-4.