Investigation of the mechanical properties of silica glasses by indentation tests A. JUHÁSZ, G. VÖRÖS, P. TASNÁDI, I. KOVÁCS, I. SOMOGYI and J. SZÖLLÖSI J. Phys. IV France, 03 C7 (1993) C7-1485-C7-1489 DOI: 10.1051/jp4:19937233