Environment effect on Keggin Ormosils as probed by XPS, FTIR and mas NMS - Carvalho, F. L. S.; Souza, A. L.; Oliveira Junior, Marcos de; Schneider, José Fabian; Misoguti, Lino; Felicissimo, M. P.; Rudolf, P.; Rodrigues Filho, Ubirajara Pereira (Brazilian Meeting on Inorganic Chemistry - BMIC, 2008)