1. “G0W0 band gap of ZnO : effects of plasmon-pole models”. Stankovski M, Antonius G, Waroquiers D, Miglio A, Dixit H, Sankaran K, Giantomassi M, Gonze X, Côté M, Rignanese G-M, Physical review : B : condensed matter and materials physics 84, 241201 (2011).   http://doi.org/10.1103/PhysRevB.84.241201