Optical spectroscopy methods for the characterization of sol-gel materialsMarques, Ana C.; Rojas Hernandez, Rocio Estefania; Almeida, Rui M.Journal of Sol-Gel science and technology2021 / 43 p. : ill https://doi.org/10.1007/s10971-021-05592-0 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS