@article{13705, author = {{Leitsmann, R. and Schmidt, Wolf Gero and Hahn, P. H. and Bechstedt, F.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Second-harmonic polarizability including electron-hole attraction from band-structure theory}}}, doi = {{10.1103/physrevb.71.195209}}, volume = {{71}}, year = {{2005}}, }