@article{article890821f2,
title   = {Relief grating induced by photo-expansion in Ga-Ge-S and Ga-Ge-As-S glasses},
author = {Messaddeq, Sandra Helena and Siu Li, Máximo and Lezal, D and Messaddeq, Younnes},
year = {2002},
journal   = {Journal of Optoelectronics and Advanced Materials}
}