Ab initio vibrational and dielectric properties of chalcopyrite CuInS2 R. Eryiğit, C. Parlak and R. Eryiğit Eur. Phys. J. B, 33 3 (2003) 251-254 Published online: 20 June 2003 DOI: 10.1140/epjb/e2003-00163-x