@misc{miscaf26efdf,
title   = {Photoluminescence of a-GeN alloys doped with different rare-earth ions},
author = {Ribeiro, C. T. M. and Zanatta, Antonio Ricardo},
year = {2004},
publisher = {Elsevier Science},
booktitle   = {International Conference on Amorphous and Microcrystalline Semiconductors - Science and Technology}
}