Optical characterization of sol gel TiO2 monoliths doped with Brilliant GreenS. A. Tomás, O. Zelaya, R. Palomino, R. Lozada, O. García, J. M. Yáñez and A. Ferreira da SilvaEur. Phys. J. Special Topics, 153 (2008) 255-258DOI: https://doi.org/10.1140/epjst/e2008-00439-y