@article{articlec168060c,
title   = {Characterization of erbium oxide sol-gel films and devices by grazing incidence X-ray reflectivity},
author = {Morelhão, Sérgio Luiz and Brito, Giancarlo Espósito de Souza and Abramof, Eduardo},
year = {2002},
doi = {10.1016/s0925-8388(02)00342-0},
journal   = {Journal of Alloys and Compounds}
}