Geometries and electronic structures of Ga2Se3, Ga3Se2 and their anions. Theoretical insights N. Seeburrun, H.H. Abdallah, E.F. Archibong and P. Ramasami Eur. Phys. J. D, 63 3 (2011) 351-358 Published online: 17 June 2011 DOI: 10.1140/epjd/e2011-10706-3