TY  - JOUR 
T1  - Connectivity in sol-gel silica glasses
JO  - Química Nova
A1  - Vasconcelos, Wander L.
SN  - 0100-4042
UL  - 10.1590/S0100-40421998000400026
VL  - 21 
Y1  - 1998
PB  - Brazil 
ER  -