Structural characterization of boron atoms in BaO-'B IND.2''O IND.3'Ti'O IND.2' system by '11 ANTPOT.B' nuclear magnetic resonance - Feitosa, C. A. C.; Maia, L. J. Q.; Mastelaro, Valmor Roberto; Schneider, José Fabian; Panepucci, Horácio Carlos; Hernandes, Antônio Carlos; Ibanez, A. (Annual Meeting of the International Commission on Glass, 2003)