@article{article6661de98,
title   = {Theoretical investigation of Hf and Zr defects in c-Ge},
author = {Scopel, Wanderla Luis and Fazzio, Adalberto and Silva, Antonio Jose Roque da},
year = {2009},
doi = {10.1088/0953-8984/21/1/012206},
journal   = {Journal of Physics-Condensed Matter}
}