@article{article6a759796,
title   = {Ab-initio study of excitonic effects in conventional and organic semiconductors},
author = {Hummer, K and Ambrosch-Draxl, C and Bussi, G and Ruini, A and Caldas, Marilia Junqueira and Molinari, E and Laskowski, R},
year = {2005},
doi = {10.1002/pssb.200461785},
journal   = {Physica Status Solidi B}
}