Encapsulating efficiency for vanadium of ZrO2.SiO2 gels prepared from alkoxides to give V-ZrSiO4 blue coloured stains

1. Monros, G.
2. Marti, M.C.
3. Carda, J.
4. Tena, M.A.
5. Cantavella, V.
6. Alarcon, J.