@article{article460b1f91,
title   = {Synthesis and some properties of hybrid gels of titanium oxide containing europium (III)},
author = {Calefi, Paulo S. and Nassar, Eduardo José and Neri, Cláudio R. and Serra, Osvaldo Antônio},
year = {1999},
doi = {10.1016/s0022-3093(99)00045-9},
journal   = {Journal of Non-Crystalline Solid}
}